Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa2b48a88333f4a…

MALICIOUS

PDF

47.7 KB Created: 2020-08-17 16:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a7896b1f7bf37d0fe323b8507ab8c12 SHA-1: 3153791ada0a59b889d5a71ed17747c73915506f SHA-256: 5aa2b48a88333f4a3b05551eb1bc3d0e1c93c8b1402292a49da2bb6caa1fcc08
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a similar URL. The presence of a link farm heuristic further indicates a malicious intent to drive traffic to external sites, likely for phishing or malware distribution.

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=lagu+ailee+i+will+show+you
    • http://letoxazoz.edgingtonroaddistrict.org/uploads/1/3/0/8/130813115/02dc750f00a4.pdf
    • http://files.culturelli.fi/uploads/1/3/1/8/131871569/490eb75aaa734e.pdf
    • http://files.stevemungrouplistings.com/uploads/1/3/2/6/132681863/1726184.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0522/0776/files/81036014064.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/898565784.pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/8999/files/upsc_all_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/1808/4771/files/95294926051.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/manumikofamu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/60545456850.pdf
    • https://cdn.shopify.com/s/files/1/0437/1064/4377/files/dariboxofo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7083/3319/files/36921274698.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/66987069094.pdf
    • https://cdn.shopify.com/s/files/1/0429/1231/7603/files/new_historicism.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_off000066eb.bin
ea3716fa91bf719bc76714b60375ea7f279995b5bbdf71086d57054750974eb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x66EB 4428 bytes
font_01_sfnt_off000076c4.bin
2fa1a759cd98fadd0d8132bf62758698e716615c5aed8b6115c656ef75509ac4
pdf-font-stream PDF embedded font (sfnt) at offset 0x76C4 4984 bytes
font_02_sfnt_off000087cd.bin
a8cfac941ce36de91590631abe6cf5dd977b492efaad1adcb23883a69e17b667
pdf-font-stream PDF embedded font (sfnt) at offset 0x87CD 14016 bytes