Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c5a3404f67696c…

MALICIOUS

PDF

42.5 KB Created: 2020-08-18 22:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5f196fd2c62621e43cfc271f9adb51a SHA-1: 57fc908fb4dd3a5c391163d654a82581be3f2f70 SHA-256: f7c5a3404f67696c46b442b95b1a9310de5a3f1abf7a4ffdd0731f6da4b3870e
140 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, suggesting a lure to a phishing or malware distribution site. The document body, though partially corrupted, contains text related to 'L1a visa interview questions and answers' and the malicious URL, indicating a phishing pretext. The presence of numerous links to external PDFs, many hosted on Shopify, points to a link farm used for SEO poisoning or traffic redirection.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=l1a+visa+interview+questions+and+answers
    • http://files.joyhakim.com/uploads/1/3/1/4/131453194/8954424.pdf
    • http://files.danielsphoto.net/uploads/1/3/2/7/132710748/vupuliluravi-xuzolesoju.pdf
    • http://files.asharpcookie.com/uploads/1/3/0/8/130814351/zodatawun.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/jadugolu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0975/9640/files/pasonurunevemesodobatima.pdf
    • https://cdn.shopify.com/s/files/1/0429/5668/5468/files/23850285097.pdf
    • https://cdn.shopify.com/s/files/1/0432/3626/2052/files/projected_balance_sheet_for_bank_loan.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/what_the_hell_avril_lavigne_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7802/files/47178909246.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77160317291.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/14938750050.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9943/files/messenger_video_to_phone.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/lajokikiruwomomezim.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006822.bin
7bc830d8c871b1d4b2d055eb5bd362259bf8517e6254b8312770ab7bdab6bd20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6822 5060 bytes
font_01_sfnt_off00007979.bin
42592edd6ec44414687522aefe08771ce8623cebc4c8b92062aabd8bf50d3023		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7979 10516 bytes

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