Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3d49ca2be06757…

MALICIOUS

PDF

41.3 KB Created: 2020-08-02 04:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e27074e927ad14335224a71242b24194 SHA-1: e592f0b97cd446b6e51f1759581dce16d607c2c7 SHA-256: 1a3d49ca2be0675795b087c43df632a80478258f17727b412bf4ae5e946ae5ef
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify?keyword=bmw+warning+signs'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure related to 'BMW warning signs'. The presence of a large number of external PDF links, many pointing to benign content but some to unknown or malicious infrastructure, indicates a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=bmw+warning+signs In PDF document text
    • http://files.infinite-ensemble.com/uploads/1/3/0/7/130739275/rirufulotefidagij.pdfIn PDF document text
    • http://files.chimtechllc.com/uploads/1/3/2/3/132303068/7298697.pdfIn PDF document text
    • http://files.lindaledwidge.com/uploads/1/3/0/7/130776088/rujufikavakisovudax.pdfIn PDF document text
    • http://files.spanishconversation.net/uploads/1/3/1/8/131857465/2479217.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/1/0433/0625/4494/files/street_fighter_3_2nd_impact.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4111/9653/files/wii_operator_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4686/0960/files/a_scanner_darkly_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1389/6352/files/62837936299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/49817104348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7473/8593/files/add_bleed_and_crop_marks_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/wumavisotezajubila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/pawomowexipajoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7404/3556/files/bloodsand_arena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/xusogemuw.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 4

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_off00006324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6324 5116 bytes
SHA-256: 1a7a2e00bf6c109e54299731145037ba08573cac6e9e1e930fa0964a6f2a69ca
font_01_sfnt_off00007485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7485 10584 bytes
SHA-256: de22f042578a788f7328007b01936cbe60a95b336d5f99cade8b9fbfc0c905a9

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