Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1888a89864d5cd1…

MALICIOUS

PDF

78.4 KB Created: 2020-08-03 06:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 16f5119c2f78689461849022e168d00f SHA-1: 49f786eb7a2aee2de98dc31591fcdae52bad7a74 SHA-256: c1888a89864d5cd1a14736a2b7697189202b1ac33b22c9c1791ce7458684083d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm with numerous external links, many pointing to Shopify domains, suggesting an attempt to obscure the true destination or leverage legitimate platforms for malicious purposes. The primary malicious URL identified is https://ttraff.ru/pify?keyword=the+king+2+hearts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=the+king+2+hearts In PDF document text
    • http://jobuj.win19.org/uploads/1/3/1/4/131453698/muxopinimijal_pikubobotaviz_reritifajegufif_voretamafukija.pdfIn PDF document text
    • http://files.weiyuzhang.net/uploads/1/3/0/8/130874156/motus_narafepuj.pdfIn PDF document text
    • http://miwidid.thewritingdragon.com/uploads/1/3/0/7/130775413/xumegexekemog-jubipe.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/relations_discrete_math.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/23450568989.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/tibuvoporonapata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/hp_officejet_h470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/86200975461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/1585044058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/15828201624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/4062378680.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30899714004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1548/8167/files/galapizawumirapikal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/the_twelve_kingdoms_anime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mabiwabupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/wotasusefotekuxaxapej.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000d432.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD432 9424 bytes
SHA-256: 0881bb79f6d8b9be4c2e4dd682b29236a7988aa7b136140143c3f5e4b4f77bf9
font_00_sfnt_off00009907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9907 14304 bytes
SHA-256: 937e54013719cefbab0fe5d294cb2325aae7e364f9f491775e9967a23d4e40d4
font_01_sfnt_off0000c440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC440 4740 bytes
SHA-256: ca1b0214c9d257259e8e0d02011b4ddcab11297a1a3f8e3c63d8ffd713b3f84a
font_03_sfnt_off0000ef1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1A 15084 bytes
SHA-256: 0bb9d33959a61f83646072ededfc2bd14d720cf48ab8140065161de75ac51b9c
font_04_sfnt_off00011db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176