Malicious PDF — malware analysis report

Static analysis result for SHA-256 1100b839ddaed5ec…

MALICIOUS

PDF

40.3 KB Created: 2020-09-23 00:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 35d0b206203d784d885cb60851a18795 SHA-1: 6a0a7addc750b85d4eb618fbbcdd17c63f933a63 SHA-256: 1100b839ddaed5ecc6bdb4fc6247dee8051b5c9c33d53bdff0982b64a6249119
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. One URL, 'https://ttraff.ru/wix?keyword=examples+of+commitment+in+the+bible', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure suggests a malicious document intended to redirect users to potentially harmful sites.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=examples+of+commitment+in+the+bible In PDF document text
    • http://zuvitubar.botleyfencing.com/uploads/1/3/1/4/131407406/mezegononewadupip.pdfIn PDF document text
    • http://files.michaelblooman.co.uk/uploads/1/3/0/8/130873846/gopidatavojexo.pdfIn PDF document text
    • http://files.scacademyofauthors.com/uploads/1/3/0/9/130969754/7364638.pdfIn PDF document text
    • http://wafiwoj.outdoorpaintersofminnesota.org/uploads/1/3/1/6/131637254/vajano.pdfIn PDF document text
    • http://bozivagok.therandstore.com/uploads/1/3/1/3/131379373/vovekotupojexad.pdfIn PDF document text
    • http://files.ntohosting.com/uploads/1/3/0/7/130776257/movolukawikepa-tumexumab-dikelorizo-pejalel.pdfIn PDF document text
    • http://files.hiawasseeapparel.com/uploads/1/3/0/7/130738652/ralesex.pdfIn PDF document text
    • http://bixilu.triangleweavers.org/uploads/1/3/1/6/131637140/5073afa72402.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8841/8718/files/polyatomic_ions_practice_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5529/9237/files/10471078293.pdfIn PDF document text
    • https://d00b45bb-fd55-4214-9739-c39abd179717.filesusr.com/ugd/ffcbea_4de7695765e94ba1ae6ab6daf74438db.pdf?index=trueIn PDF document text
    • https://1c6b9839-951f-468e-bf53-29a616ff21a9.filesusr.com/ugd/ab922d_dc7f36cc476948598fde534b4604d6c7.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6040 5324 bytes
SHA-256: a54b2485e96245992f84ce643962fbbbf6f64b66dc18ffe51760131f82999b64
font_01_sfnt_off0000723d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723D 10040 bytes
SHA-256: f10bc9dea360e36ade13171f7424012af37f4c46c7dce6a3d6fb19749e9198dd

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