Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb96781e4ee53c0…

MALICIOUS

PDF

40.7 KB Created: 2020-09-17 11:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 48170c2f90fa50bd9cb2330ca511a3d7 SHA-1: c91d3071252bc89834fa135cc727eb418565d1dc SHA-256: acb96781e4ee53c0b7a88972ef9f4f66e5f37db2247d45d86a07b77b0e832159
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Factorio how to make combat robots' and a URL that appears to be a lure. The presence of a link farm heuristic further indicates a malicious intent to redirect users to potentially 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.
  • 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.me/wix?keyword=factorio+how+to+make+combat+robots In PDF document text
    • http://files.helpbuildit.net/uploads/1/3/2/6/132695741/govedopogel_kujavadutuxa.pdfIn PDF document text
    • http://mubadoku.floydhicks.com/uploads/1/3/0/8/130873851/595093.pdfIn PDF document text
    • http://files.jrlakemen.com/uploads/1/3/0/7/130775712/a18d16ef.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/1/0438/9994/5112/files/no_mans_sky_recipes.pdfIn PDF document text
    • https://97d766c9-0313-4ff5-b3a0-90a24f0ef555.filesusr.com/ugd/c638b7_352371dd2487400996c32a0dd1c67077.pdf?index=trueIn PDF document text
    • https://1d4d4f03-b9a1-4f7f-be80-29924019f6fc.filesusr.com/ugd/b28ae2_21a253c7fb284b4cbfc1cb21259f83b0.pdf?index=trueIn PDF document text
    • https://794a9aa5-3782-4b2c-80f4-63db899ee980.filesusr.com/ugd/bb05c1_4d5ab0705de241bc8bdd454360818483.pdf?index=trueIn PDF document text
    • https://609b5c93-da12-4248-9442-4bf52204123f.filesusr.com/ugd/65e777_ca8f5839d930495ca2a0b438128e2fd5.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6959/1967/files/vizimaletuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/47216322682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6133/1356/files/besharam_300mb_movie_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3355/7149/files/arnold_ehret_rational_fasting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/desktop_audio_visualizer.pdfIn 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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6100 5256 bytes
SHA-256: 5247cb8d66648e308163eef9a9c369f954f3f6760e8ed8910fd3d257190528dd
font_01_sfnt_off000072cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CD 10308 bytes
SHA-256: 567615b8e8b057bb670375a9a5332e53e58f2cb773e7e559417ffdcf0208d1af

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