Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff382b6e35fc1da…

MALICIOUS

PDF

42.0 KB Created: 2020-08-18 14:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5fe690fa11cdfcebf9588d6a1b45278 SHA-1: f19661bc0f9ea41a2fa992a20ee8826be66ac380 SHA-256: 5ff382b6e35fc1da297316f3ed2f434b1c9a5a09deaba08a5c6e538b79d6e1bc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs that lead to a redirector service, which in turn points to a Shopify-hosted PDF. This pattern is indicative of a link farm used to obscure malicious destinations. The ML classifier and critical heuristics strongly suggest malicious intent, likely for phishing or malware delivery.

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=gamepad+terbaik+untuk+android+tv+box
    • http://files.replenishnaturalhealth.com/uploads/1/3/1/3/131382239/bunededivigi_momala_xamakamawizi.pdf
    • http://rezowokez.loyalintent.net/uploads/1/3/0/8/130814328/wuwatew.pdf
    • http://sakutema.jeremyallenmoore.com/uploads/1/3/1/0/131071164/pivivurutawu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/zasepatosa.pdf
    • https://cdn.shopify.com/s/files/1/0454/6310/9790/files/sea_animals_worksheet_for_preschool.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/basic_excel_test_for_interview.pdf
    • https://cdn.shopify.com/s/files/1/0430/0131/5491/files/36343596616.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/fujuzoduzudowo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/muwolajeligopamabezilisu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/72850345673.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/dujibavaturo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4940/files/beauty_and_the_beast_2014_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3893/files/analytical_reasoning_free_download.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_off000066e4.bin
e16c067e7712329f030f53d48d98d66c335110039ab201c9610fdc500a7ecc42
pdf-font-stream PDF embedded font (sfnt) at offset 0x66E4 5256 bytes
font_01_sfnt_off000078c2.bin
87726fb4e5e61f2627d55b17251afe0086645d29c9fd36a107015caad826aca9
pdf-font-stream PDF embedded font (sfnt) at offset 0x78C2 10032 bytes