Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bc6755fb750589…

MALICIOUS

PDF

44.1 KB Created: 2020-08-12 11:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 571480b22feee60466bfec34985b56bd SHA-1: e5c67e7189e3a4d4ed4a292a9bce2e56acdbe810 SHA-256: 78bc6755fb7505891b9603e311a4dd978f4429f3fe60b267c01b09f9ac9317ec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one pointing to a known malicious redirector. The document body, though obfuscated, contains text related to a career statement and includes the malicious URL. This suggests the document is designed to trick users into visiting the redirector, likely as part of a phishing or scam campaign.

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=sample+career+aspirations+statement+pdf
    • http://files.rtkilgore.com/uploads/1/3/0/7/130739742/8c21ae6a5.pdf
    • http://matix.quentinguitar.com/uploads/1/3/0/7/130738546/zovuka-zaxage-zoxojivim-xiwus.pdf
    • http://xipipatap.ricrna.com/uploads/1/3/0/7/130775934/ridiror.pdf
    • http://nopinu.thamesapbioloy.com/uploads/1/3/1/1/131163725/refenuluxonufexusepo.pdf
    • http://files.undisputedboxing.ca/uploads/1/3/1/4/131454304/ea91b4b82f45ba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2935/6959/files/21139062024.pdf
    • https://cdn.shopify.com/s/files/1/0434/8595/4208/files/12737332645.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6024/files/que_es_una_galaxia.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/wutiboxobirigazagu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/causes_of_increased_intracranial_pressure.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/months_of_the_year_in_french_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/78245452930.pdf
    • https://cdn.shopify.com/s/files/1/0450/7323/6131/files/distal_bicep_tendonitis_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/losegexexifuzazasav.pdf
    • https://cdn.shopify.com/s/files/1/0451/7996/1495/files/mathematical_statistics_with_resampling_and_r_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/8461/9680/files/jebipajifibe.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_off00006e16.bin
900eb8d039840c817c592ae7279d2ec3a0ab945f93d8625e2c83af85650304f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E16 5404 bytes
font_01_sfnt_off00008056.bin
0a82b8d5d0e695ad1a22dd63ac91264e4d3af2fae0909e681ce4eb30399ad8fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8056 10348 bytes

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