Malicious PDF — malware analysis report

Static analysis result for SHA-256 1154dabc8b836ade…

MALICIOUS

PDF

96.6 KB Created: 2020-07-31 10:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f88a58fa8bbdcba78ace4778871df63 SHA-1: 906d6e84dcd3f7b12af6cd74a0479df3f939a399 SHA-256: 1154dabc8b836adea489f7fdca9eedba6190e2bd0476ce5d534c5ffff61e14c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a significant number of embedded URLs, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of a link farm suggests a phishing or spamming campaign.

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=vertical+turret+lathe+machine+pdf
    • http://files.thepaperbackblog.com/uploads/1/3/0/8/130814390/tazid.pdf
    • http://files.mogosoapemporium.com/uploads/1/3/1/3/131398242/xikoribela_pazinifoxufon.pdf
    • http://files.sunrisechiropracticcenter.net/uploads/1/3/0/8/130814100/3467563.pdf
    • http://files.wardlawspoultryfarm.com/uploads/1/3/1/1/131164009/mivika-muzos-wokujonasenasi.pdf
    • http://files.danielspiro.com/uploads/1/3/2/6/132682048/jazogubikikivi-ludifuvugikudex-vifiwuba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/35849638244.pdf
    • https://cdn.shopify.com/s/files/1/0438/6121/3344/files/bejifosisa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0333/7115/files/37043140351.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/juzonife.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/94863065836.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/sobizajulonuzugawuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34515707504.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/96704371862.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/1597553348.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/nifukolibopofo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4156/2522/files/74473424165.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_off00013a6a.bin
f4e80ecc70a24341f12f2bbc38b5f0559b684ee531120625d4be7c532b6dd488
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6A 4952 bytes
font_01_sfnt_off00014b12.bin
8529a2bff9a66ae0068fe61ab47b46dffd471b3a0cb1db03e339fd1e21b9e03e
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B12 13104 bytes