Malicious PDF — malware analysis report

Static analysis result for SHA-256 f043a2c60f4aaf64…

MALICIOUS

PDF

42.5 KB Created: 2020-08-23 04:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f46f6ef7e59cfad658be1010cf0aa045 SHA-1: 53b7caff666c9a0a9925e4a423b9077d97f429f6 SHA-256: f043a2c60f4aaf649a09e22aceb19a6eccf62ae27b8f5a78b59ef2db10e47fe2
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.com). This indicates a link farm or redirector technique used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to lure users to a potentially harmful site. No scripts were extracted, and the primary malicious activity observed is the redirection via a link.

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.com/pify?keyword=autocad+app+free++for+pc
    • http://files.haileyswholebowl.com/uploads/1/3/1/3/131398143/fupogozamufogo.pdf
    • http://nakamaz.qmworkplacement.com/uploads/1/3/1/6/131607600/7148624.pdf
    • http://vowoxeva.southdevonslinglibrary.com/uploads/1/3/2/7/132740267/feratasupa-savepaxifikano-rusipuzit-kepazeve.pdf
    • http://sugewi.mansbestpetsitting.com/uploads/1/3/1/4/131408917/94ffb07584af440.pdf
    • http://files.dnewzdesign.com/uploads/1/3/0/7/130739835/4630712.pdf
    • https://cdn.shopify.com/s/files/1/0435/3176/3864/files/scaramouche_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/cognitive_behavioral_therapy_autism.pdf
    • https://cdn.shopify.com/s/files/1/0462/6346/8189/files/11861313514.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/android_messages_apk_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0429/7778/8057/files/sharp_atomic_clock.pdf
    • https://cdn.shopify.com/s/files/1/0434/0259/2410/files/45599028677.pdf
    • https://cdn.shopify.com/s/files/1/0430/6904/6935/files/vunobajosiferatunapilin.pdf
    • https://cdn.shopify.com/s/files/1/0438/9886/3771/files/doing_case_study_research_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/6147/7527/files/36030456848.pdf
    • https://cdn.shopify.com/s/files/1/0440/2121/9493/files/93080566401.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4863/files/jmeter_load_testing_report.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/west_bengal_hooghly_weather_report.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a36.bin
ed031260f30f26687966c8c75096496da89dd7d9d209f00e1a2cceefb857d92e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A36 4928 bytes
font_01_sfnt_off00007b0a.bin
1c4606e7ee82f31651a062594386154ff1b57cd65156578dfe1ee07ebb26adcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0A 10016 bytes

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