Malicious PDF — malware analysis report

Static analysis result for SHA-256 095077a55f250140…

MALICIOUS

PDF

45.5 KB Created: 2020-08-14 16:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b71629e882b363b28a7b758ed43a8a8e SHA-1: badb94ce7d7cd6eb9ef3213e296b3dfd6930ba22 SHA-256: 095077a55f250140deb7b9331e8ff7be81bc461a21c4f6c88c6051712153f35c
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links. The presence of a visual download button lure further supports a malicious intent to direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=create+a+lightning+email+template
    • http://files.capitalplanning.org/uploads/1/3/1/0/131070561/5074607.pdf
    • http://vifirat.celebratewithstringsattached.com/uploads/1/3/0/8/130874472/sizagozipomotegut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/firearm_bill_of_sale_nc.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/nopuzojudisebiridediguwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3295/2477/files/29483680067.pdf
    • https://cdn.shopify.com/s/files/1/0452/0129/3461/files/vazaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/kundalini_yoga_mantras.pdf
    • https://cdn.shopify.com/s/files/1/0438/1035/7405/files/calendrio_2020_brasil.pdf
    • https://cdn.shopify.com/s/files/1/0440/5942/6968/files/berotozekalofav.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4470/files/bank_po_exams_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/22538705427.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mesujegixaxufusataxa.pdf
    • https://cdn.shopify.com/s/files/1/0439/7491/8302/files/75620706192.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_off00007417.bin
4100390c38bbaae9fea5d1bc82f2d908881d878d2fdfffa99e2bbf0fee978f9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7417 4960 bytes
font_01_sfnt_off000084c6.bin
377e29e69959f1c4fb0000aa4e5adced377edcf090dfc5c8c9cb6c26fd34d48a
pdf-font-stream PDF embedded font (sfnt) at offset 0x84C6 10852 bytes