Malicious PDF — malware analysis report

Static analysis result for SHA-256 1471121949bdf1ca…

MALICIOUS

PDF

37.8 KB Created: 2020-08-20 08:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e64bea1ee4c4a664572d2b591b74656 SHA-1: 4434cc22b865a2d558d54c39288279c7dbd11333 SHA-256: 1471121949bdf1ca4021a47a118fa56cc9472905003dd0909d8d2c80946a338d
154 Risk Score

Malware Insights

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

The PDF contains a link farm of 26 external PDF links, with the primary link pointing to a known malicious redirector infrastructure. This suggests the document is designed to lead users to malicious content, likely for phishing or malware distribution. The ML classifier strongly supports the malicious verdict.

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=audacity+lame+windows
    • http://files.kidsanimalsplants.com/uploads/1/3/2/3/132303035/xatubekekedo_nujipopega_mamedup.pdf
    • http://files.hhkeegan.com/uploads/1/3/1/4/131437147/5735582.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1807/4786/files/eduardo_galeano_memorias_del_fuego.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/79054929962.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/imo_safety_signs.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2709/files/82052649927.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/28351680818.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tesip.pdf
    • https://cdn.shopify.com/s/files/1/0432/3727/7855/files/34340519518.pdf
    • https://cdn.shopify.com/s/files/1/0432/1430/7496/files/1911457093.pdf
    • https://cdn.shopify.com/s/files/1/0436/9842/1913/files/toyota_camry_haynes_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/fesolarog.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/translate_arabic_document_to_english.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_off000056c0.bin
7581d5eb41c412de2ab299be93606d8048128a1a2785e4a2e865e6797a224cea
pdf-font-stream PDF embedded font (sfnt) at offset 0x56C0 5172 bytes
font_01_sfnt_off0000685b.bin
9ac3cbed0980b04cac7419ee1e206d5d26f034313e3729a7b4fea203bb169f85
pdf-font-stream PDF embedded font (sfnt) at offset 0x685B 10176 bytes