Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1fd119be9a62bc…

MALICIOUS

PDF

46.6 KB Created: 2020-08-23 08:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6a04fe93f71c2f011b74ab41fba6b1b SHA-1: fe6a86b6654cf00bf975537bf40e931faf9f901d SHA-256: dd1fd119be9a62bc726a558d843eada947a8f018d9ab0940bfd9e9684151c828
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified links pointing to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=abduction+movie+2019'. Another critical heuristic indicated a PDF link farm with 30 external links, many hosted on cdn.shopify.com, but also including several unknown URLs pointing to potentially malicious domains. The document body itself contains garbled text but includes the malicious redirector URL. No scripts were extracted from this sample.

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=abduction+movie+2019
    • http://saxewat.ocacolorrun.com/uploads/1/3/2/8/132814439/wivajopumu-dabikafelimore-bukufuzikami-goloxeno.pdf
    • http://files.dataethics.net/uploads/1/3/1/4/131453902/budavebivifi-mowitukopowup-kinibowokos-ziwej.pdf
    • http://jukebud.redeemernewton.com/uploads/1/3/2/6/132683008/paginowevugalap.pdf
    • http://pugux.hopskipserve.com/uploads/1/3/1/4/131438188/kukadevo.pdf
    • http://files.infinite-life.com/uploads/1/3/0/7/130738765/7deff942d9a0f2e.pdf
    • https://cdn.shopify.com/s/files/1/0434/6645/7254/files/83601583453.pdf
    • https://cdn.shopify.com/s/files/1/0466/7300/2661/files/employee_review_templates_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/subordinate_conjunctions_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85213016947.pdf
    • https://cdn.shopify.com/s/files/1/0432/5192/5155/files/zapawuni.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/libro_aprender_frances_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3643/files/sidewalk_prophets_live_like_that.pdf
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/logowotat.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/18611481817.pdf
    • https://cdn.shopify.com/s/files/1/0439/2619/2283/files/sepsis_shock_guidelines_2018_ting_vit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067da.bin
59d8a197f695ea7e52245039fe432fc99fe62dfcfd535f67a7b7b4a7a4e3dc7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67DA 5240 bytes
font_01_sfnt_off000079a4.bin
d473ee4df2b0ff15c2eb183d9aa2b76bd39d281238006462913a9f17e928aefd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A4 5088 bytes
font_02_sfnt_off00008a32.bin
1780b37d20e68c29464a76584909b1906ead98c54601ed6007b74e3a237a40a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A32 10444 bytes

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