Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d190a3a024c9034…

MALICIOUS

PDF

42.7 KB Created: 2020-08-20 22:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b68b2915cb297d30f9c2e5539ee0132b SHA-1: 2be6acfaa56cbc302252df70e38b7187bb17d9bc SHA-256: 6d190a3a024c903472eee2adc676504630c6b6d25fd0b2502410bcf8f8dc6e08
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a movie download, which is then linked to the malicious URL. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=batwara+movie++3gp
    • http://files.sevenwondersofwashingtonstate.com/uploads/1/3/0/7/130776599/jutukekilipim_baxosizetapefow_sexuv.pdf
    • http://taguzevul.moliereexpressions.com/uploads/1/3/0/8/130873995/tojanojix-rigenujewolit-kagifimifos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/16294852743.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/22730472863.pdf
    • https://cdn.shopify.com/s/files/1/0436/0008/5160/files/15360000360.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/pitekorezuwafuvagavipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/tawad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/33354230122.pdf
    • https://cdn.shopify.com/s/files/1/0431/7895/0810/files/58252903161.pdf
    • https://cdn.shopify.com/s/files/1/0429/8099/9321/files/granting_certiorari_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/2459026612.pdf
    • https://cdn.shopify.com/s/files/1/0443/4237/8652/files/cartesian_plane_quadrants.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8904/files/38204948236.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_off00004f02.bin
8ec41cfc2f93883ab7083701c1a9278db16b3154a505aa90c965080eb213076d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F02 5296 bytes
font_01_sfnt_off0000610d.bin
8e8d496aa61ffe705cda4f2557579bb2118db3dba18c9decb9013a2a1f1bdad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610D 14884 bytes
font_02_sfnt_off00008fb6.bin
249ddb909e85eef4ad1027e9102f0da44d27d6908b3651d438c65e0935c03cca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB6 3916 bytes

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