Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f012d8364dda63…

MALICIOUS

PDF

48.4 KB Created: 2020-07-31 19:41:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1aa71dfdddce5669b315f81e49c0549 SHA-1: 87e8d9fa2023f11d1b1fc2afc0a2ab3506f334c3 SHA-256: f0f012d8364dda6353aff4721acde2a79a55f310a02a7a32a885f23d92666096
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link to 'ttraff.ru' is identified as a malicious redirector. This suggests a link farm or SEO poisoning tactic to lure victims. The document body, though heavily obfuscated, contains the target URL, indicating the intent is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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+man+from+snowy+river+cast
    • http://files.northernohiometalroofing.com/uploads/1/3/1/3/131398134/xubutanofebinumulot.pdf
    • http://files.acrossthecreekorganics.ca/uploads/1/3/1/8/131857421/f46fd9d0446a.pdf
    • http://files.ultimategymsports.com/uploads/1/3/1/6/131606619/nisozofivo.pdf
    • http://files.theflourishsisterhood.com/uploads/1/3/1/3/131398156/95d18288fa830.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/mebubavem.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/sakorerepekesaneresumi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2635/files/ganaginureba.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/pupuwodezanovivorawaforak.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1049/files/witoroxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/zefana.pdf
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/xunipopubividere.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/66746909695.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libuzab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/35623612302.pdf
    • https://cdn.shopify.com/s/files/1/0435/0155/1771/files/wufizusazodewojinugexe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/98178347971.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/nozejem.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/jilexetape.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000718a.bin
2b68f3338a4781ddfbfb889032d2751b12c8ead44bf3febc83c080dab0691f2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718A 5080 bytes
font_01_sfnt_off000082bf.bin
084ae2bc28fbde4bfa12d8fc4ba5608e56cf5b6d939efd7c2c43d18facfa95b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BF 10340 bytes
font_02_sfnt_off0000a60b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA60B 4324 bytes

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