Malicious PDF — malware analysis report

Static analysis result for SHA-256 96cc86b5d4bad735…

MALICIOUS

PDF

43.5 KB Created: 2020-08-14 12:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36778aeb49c8539afa9b90339dfaae75 SHA-1: f4486ae5168f3284366ce31af722324c5e707332 SHA-256: 96cc86b5d4bad735620ae4456fbb48cb248f79bed5a5bc06a5d506bf9a9ab31c
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com, which is likely part of a phishing or malware distribution campaign. The document body text and embedded links suggest a lure related to an 'account manager apk'. The presence of a large number of external PDF links, many pointing to Shopify, indicates a link farm used for SEO poisoning or to obscure the final malicious destination.

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=account+manager+apk+7.+0
    • http://nibiki.sealpressinformation.com/uploads/1/3/1/6/131636725/4872eeadc9e334.pdf
    • http://files.harrelsonmomentum.com/uploads/1/3/1/3/131384127/c738df4b353fe.pdf
    • http://pidimiruz.stephaniemclaughlinart.com/uploads/1/3/1/4/131438216/xuwitezi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9499/files/accounts_payable_officer_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0435/6256/5795/files/retopabijakukif.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/27017518311.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/gba_video_roms.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8892/files/medowo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1384/files/agriseta_bursary_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/walter_benjamin_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/rorenajufoto.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/50415903566.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/luvisokogezapawenojax.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b43.bin
127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B43 6744 bytes
font_01_sfnt_off00006c2a.bin
e3202695e3e814729dec0ebd5f491b7a25b9e38eeb19766b70d9aef114a04fe2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2A 5352 bytes
font_02_sfnt_off00007e4e.bin
7d716720cf2df14209bd976bbe23b9e1a98e005ffa458e2962e5065d82d6006a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4E 10128 bytes