Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db048952ede4462…

MALICIOUS

PDF

45.7 KB Created: 2020-08-19 19:29:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6074e034c90eb5480f6d697016ba1f4b SHA-1: 6eb91a7fc1cc9eb3ca45b5af286c349d0303f121 SHA-256: 5db048952ede4462c96003c729336355ab89be598d594ed437ce838ace472abf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/pify?keyword=all+animal+scientific+name+list+pdf, which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to drive traffic to malicious infrastructure. No scripts were extracted, but the heuristic firings strongly indicate a link-farming or redirection attack.

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.cc/pify?keyword=all+animal+scientific+name+list+pdf
    • http://files.wargamemodelsinohio.com/uploads/1/3/1/0/131070009/3863787.pdf
    • http://files.stpatricksripon.com/uploads/1/3/1/3/131381539/4758867.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/30918959716.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/xabuludefowi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/damejaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/60211489697.pdf
    • https://cdn.shopify.com/s/files/1/0440/5130/0517/files/cbse_nic_in_newsite_attach_ds1218.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/idsa_candidiasis_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7641/files/pivopolulojogewopida.pdf
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/85768564306.pdf
    • https://cdn.shopify.com/s/files/1/0437/0215/7466/files/68864815541.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/substance_abuse_and_dependence.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/24614902761.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007579.bin
0231d4dc2522b70dd9e5dde7fd6fc2ae2d521690e40649cd9f6cf2611ca80502
pdf-font-stream PDF embedded font (sfnt) at offset 0x7579 5196 bytes
font_01_sfnt_off00008709.bin
9c502a31896dc0f15c3949ffb9907a7d4a2a322533258e313c208c9bf30548c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8709 10120 bytes