Malicious PDF — malware analysis report

Static analysis result for SHA-256 70897c0b7291eb9e…

MALICIOUS

PDF

42.6 KB Created: 2020-08-05 12:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64963c978adcbc0472c968ede98d1ded SHA-1: 36c14b4c89c72508cb36551b101513ce020c6dc4 SHA-256: 70897c0b7291eb9eab01a6f2dc242d44179dd99e358a114cd164ccb886f6dd2a
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially garbled, contains the same URL, suggesting a lure to a malicious site. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to benign Shopify URLs, but the primary malicious link is the most concerning.

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=cuales+son+los+generos+periodisticos+pdf
    • http://files.aspenridgeslavelake.com/uploads/1/3/1/3/131384573/2753184.pdf
    • http://files.luismojica.com/uploads/1/3/1/6/131636907/7781662.pdf
    • http://files.argonsizzle.com/uploads/1/3/0/7/130738748/votuvavawobamimas.pdf
    • http://files.edhgs.com/uploads/1/3/1/4/131408529/lujaremokike_nezuki_derunelizaxeti_kelabij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4745/0784/files/zomoxobinabepokat.pdf
    • https://cdn.shopify.com/s/files/1/0433/8515/9845/files/2523640439.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/26667204907.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/nitomufaxasun.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/astronomy_today_8th_edition_chapter_3.pdf
    • https://cdn.shopify.com/s/files/1/0438/5033/4368/files/67336885843.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/quizlet_hacker_match.pdf
    • https://cdn.shopify.com/s/files/1/0438/3267/2418/files/87474652478.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/dazujalofewew.pdf
    • https://cdn.shopify.com/s/files/1/0440/3272/1046/files/20568466995.pdf
    • https://cdn.shopify.com/s/files/1/0438/3096/8480/files/3516283845.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_off000066c0.bin
12fe847596c4bffe95793a28a0df8a43d84e4ece5a8ea7e52ff06f2d1ccbe483
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C0 5228 bytes
font_01_sfnt_off00007894.bin
d48dc9f44f8e0758839dcefdac9b9e99f28b839d8a126277c788e60688f3618b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7894 10988 bytes