Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d06afd4737f28b…

MALICIOUS

PDF

39.8 KB Created: 2020-08-22 11:39:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b979cbbca9c4f814f25ace46cc3a842 SHA-1: cb3bd47ff2127fae8c20599f4f2238241a330af5 SHA-256: f7d06afd4737f28bc05937425b87327745756e7c7fc5391456b487f3532620c5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be a link farm designed to lure users to malicious infrastructure, potentially for further exploitation or phishing.

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.cc/pify?keyword=agnisakshi+serial+full+title+song
    • http://pigidoxi.sanantonioguardianangels.com/uploads/1/3/0/7/130738697/wotupozorifit-vokilaril-zijivolago-sawexapaval.pdf
    • http://files.idrha1.com/uploads/1/3/1/4/131438216/sujiwitediwomojuri.pdf
    • http://files.akita-inu.com.pl/uploads/1/3/1/1/131163846/texop-garubeferaru-pufek-bujutajiger.pdf
    • http://files.huntingforadventure.com/uploads/1/3/0/9/130969633/6782241.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/nises.pdf
    • https://cdn.shopify.com/s/files/1/0461/8066/3450/files/eliciting_information_from_students.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1415/files/mind_over_matter_meaning_yahoo_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/zotuzibufinilugivagep.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7820/files/1075909121.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/61984796707.pdf
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/nuvobutodipugir.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/47612694222.pdf
    • https://cdn.shopify.com/s/files/1/0438/3893/1109/files/7944815110.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048ef.bin
fd99295b3af104b4d7e614b61842b85547bd4772c8725081b87a643de35f4bab
pdf-font-stream PDF embedded font (sfnt) at offset 0x48EF 5084 bytes
font_01_sfnt_off00005a36.bin
755315527ce9c35805d812621621eac676a4fb905847d1257874a8e5deb4085a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A36 9844 bytes
font_02_sfnt_off00007c26.bin
226a8e4e528c820945b068501793868e9b71e899c703a7ad804f9a2f424011a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C26 16384 bytes