Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa60dd9db63996c…

MALICIOUS

PDF

38.1 KB Created: 2020-08-22 10:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 511db08e8dd10a660246a80afd3a3c3d SHA-1: d1dc9011b1620c96acc08ad372a49eceb08e8ddb SHA-256: 0aa60dd9db63996ca64e1ccf26da3c06734b9e5451ef2a07c92d27407a645204
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or redirection attempt. The document body itself contains the malicious URL, indicating an attempt to lure the user to a potentially harmful site.

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=coulomb+force%2528+static+gizmo+answer+key
    • http://files.bonafidefiction.com/uploads/1/3/2/6/132682899/wopupamigusegu.pdf
    • http://kokaziwag.themooryouknow.com/uploads/1/3/1/0/131070043/tuwiropipevarejufam.pdf
    • http://files.patriciavillalobos.com/uploads/1/3/0/8/130813860/juxavasetinejo-widini.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/dictionnaire_thmatique_maritime_anglais-_franais.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/45191892143.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/55653114855.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/57671111188.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/computer_systems_warford.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/termidor_he_safety_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0439/9667/6254/files/ender_io_power_to_rf.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/ramadan_2020_calendar_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1660/1249/files/48270817045.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/86986831686.pdf
    • https://cdn.shopify.com/s/files/1/0433/3823/6062/files/rulefojem.pdf
    • https://cdn.shopify.com/s/files/1/0430/1986/2179/files/fujibigu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/three_generation_genogram_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58863311498.pdf
    • https://cdn.shopify.com/s/files/1/0432/3832/6432/files/mijabuzadopamirikowavesi.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_off000055e0.bin
5216ee6e912e06652d6c23cb2e84c65ff94535e667e6ea058f81d0eb79c9c2e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55E0 5632 bytes
font_01_sfnt_off0000692b.bin
088ea04ef3195d274a069a3d6fff91b16b5fce648798d2f8737dd09160e57ba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x692B 10040 bytes

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