Malicious PDF — malware analysis report

Static analysis result for SHA-256 706f3a0d838a82fc…

MALICIOUS

PDF

62.8 KB Created: 2020-08-22 03:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbcff375901c83aa673256c184b5ccd7 SHA-1: 36a764bf43de3708c14db08965b6c8d94c12eb5e SHA-256: 706f3a0d838a82fcc069b3b02418248060ba4b436e72321a1247aabdd5b726e7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially corrupted, contains text related to 'South jersey fishing report 2018', suggesting a lure to disguise the malicious intent. The presence of a large number of external PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

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=south+jersey+fishing+report+2018
    • http://jowulixov.brickandbaking.com/uploads/1/3/1/4/131438667/fekidobuz.pdf
    • http://guxepu.pattiagapi.com/uploads/1/3/1/4/131453293/d4345dbf8c6.pdf
    • http://files.mscbmx.co.uk/uploads/1/3/1/4/131406108/5605037.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/3727/7855/files/zopovarazarezinirojo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/rolling_stone_top_500_songs.pdf
    • https://cdn.shopify.com/s/files/1/0437/3980/7893/files/tratado_de_aggayu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3520/4511/files/cengage_physics_2020_edition.pdf
    • https://cdn.shopify.com/s/files/1/0464/7914/7176/files/7826721157.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3902/files/35497848969.pdf
    • https://cdn.shopify.com/s/files/1/0431/5503/0170/files/english_grammar_tamil_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8018/files/protein_structure_levels_of_protein_structure.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/prime_numbers_1_to_100.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/ximowozojoso.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/parimi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9313/9357/files/44942330630.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009eaf.bin
e35cac13ab71a6845f29c4c1aebe9589c6909d9e96ef177a0b41e2bb1f775b08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EAF 5604 bytes
font_01_sfnt_off0000b1d0.bin
cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1D0 1936 bytes
font_02_sfnt_off0000bb0f.bin
abafd8ff2a34d34281c401a77c15d37002a8f4b7ccdfa8b0903ed0612a3bdf9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB0F 10748 bytes
font_03_sfnt_off0000dfc7.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC7 4324 bytes

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