Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fcc92703c3cc700…

MALICIOUS

PDF

48.7 KB Created: 2020-08-21 11:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce50d54b1fb09889c10950022806f086 SHA-1: 53f0bfcd514cc7568f013beec1ac6a6faede25fb SHA-256: 9fcc92703c3cc700e2a3597b17afa51569bf904d3527658a194418a292b4d688
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.ru/pify?keyword=nutrition+label+worksheet+answers+key+whopper+sandwich. This indicates a phishing or scam attempt leveraging SEO poisoning techniques to lure victims.

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=nutrition+label+worksheet+answers+key+whopper+sandwich
    • http://detawu.mushroomforaginginmn.com/uploads/1/3/0/9/130969744/setarevofuroxerenol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9639/2348/files/23501351045.pdf
    • https://cdn.shopify.com/s/files/1/0429/0704/1959/files/wiganifobadeda.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8503/files/lugika.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/rirekefufekinugubonaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53741046047.pdf
    • https://cdn.shopify.com/s/files/1/0432/3760/5544/files/zegowiguwefinebobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/2999861210.pdf
    • https://cdn.shopify.com/s/files/1/0430/2438/4154/files/limuzurijuvo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4505/9749/files/jaxufafepavexari.pdf
    • https://cdn.shopify.com/s/files/1/0436/9262/1979/files/important_synonyms_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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065de.bin
9a94a573822bb546207f089d05b901c469b5b76a21f9d7330b196d73b7ef5324
pdf-font-stream PDF embedded font (sfnt) at offset 0x65DE 5408 bytes
font_01_sfnt_off0000784a.bin
d22d16527487abea74e71b472ed4dd3189e10b48a2afa2ef65a5116765782d29
pdf-font-stream PDF embedded font (sfnt) at offset 0x784A 15176 bytes
font_02_sfnt_off0000a7a6.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A6 4324 bytes