Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d994c285bbaf3a…

MALICIOUS

PDF

50.6 KB Created: 2020-08-02 13:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d11993dd2995a2ece33b5de38080b069 SHA-1: 3c06cc55b88dc74d4393010c4603d4b8293e7080 SHA-256: 14d994c285bbaf3a026eccff57b5bba752c7be1eb71fcd9472471ae65e419cd4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users to external sites, likely for SEO spam or phishing, by presenting a link farm within the document.

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.com/pify?keyword=all+bloodborne+weapons
    • http://files.trendythreadsboutique.shop/uploads/1/3/1/4/131453402/dumudovinuf_momitow_jopajazukokox_dafodifiludufuj.pdf
    • http://files.empressboatclub.org/uploads/1/3/1/4/131406473/aee5c81d0d.pdf
    • http://files.asthecrowfliesquiltshop.com/uploads/1/3/0/7/130738771/xamalik.pdf
    • http://files.highlightgroup.com/uploads/1/3/1/3/131383953/9645581.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/77366986866.pdf
    • https://cdn.shopify.com/s/files/1/0437/2650/4086/files/zaniz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0712/3357/files/22389855635.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/90448606809.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/8140024802.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigemeziguvego.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4485/files/dinisamidoju.pdf
    • https://cdn.shopify.com/s/files/1/0432/3488/5789/files/vokukatugewojumedokebu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/pathfinder_mythic_adventures.pdf
    • https://cdn.shopify.com/s/files/1/0430/1268/5977/files/50_shades_of_grey_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9511/2347/files/88883239446.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c1a.bin
ffdebeab77debc6e5a677b783743f8a172656263356d38dc31518b95b4ca7471		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1A 4836 bytes
font_01_sfnt_off00008c85.bin
06be5d2f0cc13ca559e98cb928e83bd2a0755c52b1cc9495f7a2037cd2a165e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C85 10360 bytes
font_02_sfnt_off0000afe6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE6 4324 bytes

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