Malicious PDF — malware analysis report

Static analysis result for SHA-256 788cd7e641ec2583…

MALICIOUS

PDF

151.0 KB Created: 2020-08-18 20:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5501221bbd25021a6ac27cb81c024bc1 SHA-1: bf27443ef33668c18c7c3aa89851bb60b8678eec SHA-256: 788cd7e641ec2583cf018a5e95fee7d11498ee8d718058c61977580cbfdbc15c
134 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure the user into clicking it. This URL is likely part of an advance-fee scam, as indicated by another heuristic. No scripts were extracted, but the presence of a malicious redirector URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.cc/pify?keyword=legal+dictionary+free++pdf
    • http://files.manduraharmysurplus.com.au/uploads/1/3/2/7/132712222/lozomumenojiva.pdf
    • http://pufatape.thebeerfrontier.org/uploads/1/3/2/7/132710776/1012734.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/preschool_art_curriculum.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/camp_hill_prison_visiting_information.pdf
    • https://cdn.shopify.com/s/files/1/0435/8206/2753/files/al_quran_juz_23.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/gta_vice_city_cracked.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/the_bloody_chamber_angela_carter.pdf
    • https://cdn.shopify.com/s/files/1/0437/7975/2087/files/acellus_answer_key_math.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/3799246111.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4044/files/10727360848.pdf
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/69306709488.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/mental_health_illness.pdf
    • https://cdn.shopify.com/s/files/1/0431/3556/5990/files/jaxama.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/2669081408.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2970/files/42895740196.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/11961685404.pdf
    • https://cdn.shopify.com/s/files/1/0431/1554/4737/files/energia_eolica_unam.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020a41.bin
7513af0d2369a3eee2b71ae2a1ee229bb41a7a8b45bb957981d07eaddf186476		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20A41 4976 bytes
font_01_sfnt_off00021b40.bin
768362f31fa437e5db98cb5ebf22893a8a75cda0b967cdf59ff490f2e5a44109		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21B40 10816 bytes
font_02_sfnt_off00023ffb.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23FFB 4324 bytes

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