Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7d2a03b252ea3d…

MALICIOUS

PDF

46.2 KB Created: 2020-07-30 05:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b3fef4e2cbef9efe841556753ec6a05 SHA-1: 8180c0c23c0675b016dff30103dd2f3233cc9abb SHA-256: 5a7d2a03b252ea3d4403ce112d4a1c2d92f1eba8456906fc9901fd3a1b06367b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, potentially 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.ru/pify?keyword=bonacci+editore+pdf
    • http://files.bonneygirlphotography.com/uploads/1/3/2/6/132681204/sapoxorufewodod.pdf
    • http://files.nawink.com/uploads/1/3/0/8/130813913/1113915.pdf
    • http://files.scenicroadsrv.com/uploads/1/3/1/4/131453902/dopozol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/kitakokikenajapaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/1375/7339/files/fojixitezokudujido.pdf
    • https://cdn.shopify.com/s/files/1/0433/5383/3637/files/96052680457.pdf
    • https://cdn.shopify.com/s/files/1/0427/5427/7532/files/widoropirolu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/21000661405.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/69806398278.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/67693843178.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/78203510481.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6972/files/56198906235.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/48245799052.pdf
    • https://cdn.shopify.com/s/files/1/0431/0342/0570/files/51126167112.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_off0000790f.bin
3ad3469bf88b0f0f394d4a60a843671d659c45577369cc8803d21eb94143e927
pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 4776 bytes
font_01_sfnt_off0000894b.bin
21eaa8208e71ac8cefacb8662daa6c95334b6edf22cd63acc714155b3831c638
pdf-font-stream PDF embedded font (sfnt) at offset 0x894B 10052 bytes