Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ea183d2a423bd8…

MALICIOUS

PDF

38.1 KB Created: 2020-08-19 04:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67f766b3a20f76cb4786d90b1ee3bf06 SHA-1: c377d3fc56aecc142aa50d23bdbe27f1d2f2b9aa SHA-256: 09ea183d2a423bd828993d3db6d6e88258e128b46d13b2a5b46b2fe8a58eba97
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to distribute further malicious content or phishing pages. The document body and embedded links suggest a lure related to updating WhatsApp, a common social engineering tactic. The presence of numerous external PDF links, many pointing to benign Shopify domains, indicates a potential link farm used for SEO poisoning or to obscure the malicious redirector.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=atualizar+whatsapp+2018+android
    • http://files.gracejiang.info/uploads/1/3/1/8/131856627/4945528.pdf
    • http://files.vineyardmuscatine.com/uploads/1/3/1/4/131453015/dd142e69.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/fojifalozijaneterik.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/6059508105.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/life_and_death_twilight_reimagined_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6539/9713/files/karavigajorisija.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/buxamumedile.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4711/files/jinepoxekikadukimulomonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0096/2967/files/2341934090.pdf
    • https://cdn.shopify.com/s/files/1/0440/7299/2918/files/school_uniforms_bad_idea_essay.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4986/files/the_witness_town_puzzles.pdf
    • https://cdn.shopify.com/s/files/1/0450/0901/0852/files/wakejunisorivujasa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3465/6423/files/dizetajumuku.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056b0.bin
4eb7397bf6b51d7446c007593eca54809f8103d3f1374b09cc05c04147697649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B0 5696 bytes
font_01_sfnt_off00006a23.bin
78a44a948b41f7ddcf1076ba2c4d22dbf5295873f7386ec87a738ae793b042a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A23 9876 bytes

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