Malicious PDF — malware analysis report

Static analysis result for SHA-256 49254302a8417ddb…

MALICIOUS

PDF

38.3 KB Created: 2020-08-08 04:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cd088816de41104bd91516040a00d0e SHA-1: 2f8a406da44fd61f31bbf4db6b88889548f699b1 SHA-256: 49254302a8417ddb7aaa5d910d44a9e701d01b5d70535197dde110a16157b55a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one heuristic identifying it as a PDF link farm and another flagging a specific URL as a malicious redirector. The document body, though partially corrupted, contains text related to 'worksheets' and includes the malicious URL, suggesting a lure to a site that likely hosts further malicious content or phishing pages. The presence of multiple Shopify links, while some are benign, indicates an attempt to blend in with legitimate content while directing users to malicious infrastructure.

Heuristics 3

  • 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.
  • 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=active+and+passive+voice+simple+present+tense+worksheets+pdf
    • http://files.jayjordanhawke.com/uploads/1/3/2/7/132740997/9101261.pdf
    • http://files.thecollegiatechoice.com/uploads/1/3/1/4/131437563/9c9de121.pdf
    • http://lener.pastorsteveyork.org/uploads/1/3/1/8/131856772/c9e784cf96.pdf
    • http://files.fairhavenkids.com/uploads/1/3/2/3/132302870/fefaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viloronijiletamuzolodoxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/jujorolekevawegisafafa.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/vikalixenegoxafuwufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/labevibibenuwapodazutolax.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/32103638950.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7254/files/adt_safewatch_pro_3000.pdf
    • https://cdn.shopify.com/s/files/1/0439/7786/7422/files/buxebemunelasaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/wunagigutuwifafiwozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/bimajawipuzatozupin.pdf
    • https://cdn.shopify.com/s/files/1/0436/1751/7725/files/logical_reasoning_sample_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/denozogezegapogepoke.pdf
    • https://cdn.shopify.com/s/files/1/0437/7129/7943/files/rewosuziwasenugemu.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_off00004a35.bin
0b40e6ff4fe9a01c03fb068de858cabaeeb6c4fa971444c488c48fea2c527e2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A35 5388 bytes
font_01_sfnt_off00005c69.bin
ea40ff25cfd0bf0f7e34bc352689d73073e5b0280b1f2674a6adc9c1f6e89aea
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C69 9680 bytes
font_02_sfnt_off00007d89.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D89 4324 bytes