Malicious PDF — malware analysis report

Static analysis result for SHA-256 a178c50edc6d5bad…

MALICIOUS

PDF

41.3 KB Created: 2020-08-06 14:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8791b5797031687f64e9c9107c5eacd SHA-1: ac86167237ddf9a0a17cbe4365d60a274145e634 SHA-256: a178c50edc6d5bad0abdb45efc79dd493e48429c96727b9ff1237521e823d41a
130 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm for SEO manipulation or to obscure malicious destinations. One URL, 'https://ttraff.cc/pify?keyword=basic+electrical+engineering+short+notes+pdf', is identified as a malicious redirector. The presence of a 'download button' heuristic further supports a lure-based attack. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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.
  • 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
  • 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=basic+electrical+engineering+short+notes+pdf
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdf
    • http://files.colettejonopulos.com/uploads/1/3/1/4/131483138/755b9dfc8.pdf
    • http://files.susanedwardsartwork.com/uploads/1/3/1/0/131069978/6351905.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9469/files/kaporadijonala.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/sewotaderajizik.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/sowevopupawosesunifivavo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/piladumosoxasapisenegege.pdf
    • https://cdn.shopify.com/s/files/1/0440/7338/6136/files/jquery_resizing_image.pdf
    • https://cdn.shopify.com/s/files/1/0430/5498/9466/files/75993510265.pdf
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/44414661265.pdf
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/wufugot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lujodegiduwidixerilaji.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/bullying_in_the_workplace_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/89369284229.pdf
    • https://cdn.shopify.com/s/files/1/0439/6023/8238/files/37199478944.pdf
    • https://cdn.shopify.com/s/files/1/0440/6856/9238/files/albinism_disease.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/surirapixavetoxowefed.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_off00006161.bin
732cbebb588f2d4c8ba3a25b684f6879ec854489fa7c54d0cb6972af604f3498
pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 5468 bytes
font_01_sfnt_off000073f0.bin
0d259e9923e0857f62ced76e25b5359f8a3bab9c4f710110ccef57d1abc73a78
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F0 10604 bytes