Malicious PDF — malware analysis report

Static analysis result for SHA-256 7acc861a973b2840…

MALICIOUS

PDF

47.0 KB Created: 2020-08-11 04:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b010a8856393688b85a55947d5bdad5 SHA-1: e04b7dbfff0a53eb1442f55c1f565eee14d15579 SHA-256: 7acc861a973b2840c207bdfdce56e3bac402facde5782207099c34ef945c79f7
154 Risk Score

Malware Insights

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

The PDF contains a URL that is flagged as a malicious redirector, disguised within content that appears to be about eclampsia. The presence of numerous other links to PDFs hosted on Shopify suggests this file is part of a larger link farm or SEO manipulation effort, designed to drive traffic to malicious infrastructure. While no scripts were extracted, the PDF structure itself contains embedded URLs and is classified as malicious by an ML model.

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=que+es+eclampsia+pdf
    • http://jepexune.goldenhoursc.com/uploads/1/3/0/9/130968996/rasepugopamudi-rigulexovumav-tujeduwejo.pdf
    • http://kozexo.modernsteps.net/uploads/1/3/1/6/131607029/9193044.pdf
    • http://files.lilysparkles.co.uk/uploads/1/3/1/3/131380213/7cca1355f7959a.pdf
    • http://files.fitkitchenph.com/uploads/1/3/1/6/131606343/wobejutaw-bovinixavuj-mogigo-nizevo.pdf
    • http://files.innerheartpathways.com/uploads/1/3/2/6/132681002/46e9335.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1207/8243/files/80877017645.pdf
    • https://cdn.shopify.com/s/files/1/0437/9607/0549/files/catalytic_cracking_process.pdf
    • https://cdn.shopify.com/s/files/1/0431/1161/2572/files/como_aprender_ingles_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/anemia_drepanocitica_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/sogowefamekifobujud.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/58796117343.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/varanomavumozomadeda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://cdn.shopify.com/s/files/1/0437/1624/7703/files/waxenawimudodoforemata.pdf
    • https://cdn.shopify.com/s/files/1/0430/7858/2439/files/72245663013.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/farapun.pdf
    • https://cdn.shopify.com/s/files/1/0438/1245/4560/files/tusajapegiduzimokilare.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_off0000787d.bin
76c4dc4a40701bbfed73545a8900b56104e8641fea8a149cb618d1bff0ddfdeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x787D 5268 bytes
font_01_sfnt_off00008a5a.bin
7dc6e20bf7c791b8369a96a3d332d9c5e61fa91c810645358f2d020f78caaf7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5A 11448 bytes

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