Malicious PDF — malware analysis report

Static analysis result for SHA-256 22531b143056120f…

MALICIOUS

PDF

43.3 KB Created: 2020-08-19 15:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f6474572e7c0311d2c45817ec119e29c SHA-1: bdb8b31d4d74e0bc81e910d825dcd33617635c77 SHA-256: 22531b143056120fd044f179216ba8d36ae9182b8f3e1043d39d063d15fe4cae
194 Risk Score

Malware Insights

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

The PDF contains a deceptive lure related to 'Top 10 android cell phones 2019' and embeds multiple links. One critical heuristic indicates a PDF link to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=top+10+android+cell+phones+2019`. Another heuristic flags a PDF link farm, with many links pointing to Shopify domains, but the primary malicious indicator is the redirector. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=top+10+android+cell+phones+2019 In PDF document text
    • http://gisazolaj.baderministries.com/uploads/1/3/2/6/132680835/3309822.pdfIn PDF document text
    • http://files.sunfirerealestate.net/uploads/1/3/1/4/131438776/wuvolasevaroge.pdfIn PDF document text
    • http://files.otterpointathletics.com/uploads/1/3/2/7/132710659/daxusasonusetidufe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/non_gmo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4953/9989/files/meyer_snowplow_troubleshooting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/basecamp_garmin_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3633/4488/files/rowudamilafurelexerenefoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/77811540944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1627/3576/files/normality_test_skewness_and_kurtosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/6614/3399/files/ncert_history_book_class_8_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1650/0886/files/levebekulanorizomugaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/zibuwiwenumujokeru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/dosepekuxel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/five_characteristics_of_anglo_saxon_literature.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://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE7 5592 bytes
SHA-256: 92a8c093a4a38dff0e54cf011cf5b0b40b404f199f43547907b387a9df5e811e
font_01_sfnt_off00007dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD9 10112 bytes
SHA-256: 0308171b514b9fcd42d86879cc8c8550b4084afbddadf8f4618c167d53fc2c6f

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