Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b7bb24234d6b299…

MALICIOUS

PDF

45.2 KB Created: 2020-08-24 09:51:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03db196ca19724ab0ebcd4c8c3a81161 SHA-1: 14175175cf394acb557c3a0de07a0e03396bc2fa SHA-256: 7b7bb24234d6b2997cff051000405dbcfac20a021ddceb681fc9b8c80a357ad6
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL and a link to a Shopify-hosted PDF, suggesting a link farm or SEO poisoning tactic. 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.com/pify?keyword=aplikasi+video+editor+android+terbaik
    • http://files.bowmanid.com/uploads/1/3/0/8/130873914/sogupujubole-tojimowujuzixo-jikidijiwil-kinolofefil.pdf
    • http://files.torratymakeup.com/uploads/1/3/0/8/130874691/ruwimugetub.pdf
    • http://files.brendaswenson.info/uploads/1/3/0/7/130775556/sumupat_bosujila_luvorexewoxugi_fonikemad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0450/9886/0707/files/rirukuxokafesaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0443/8438/7238/files/cmp_cable_gland_selection_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/9843/0876/files/english_grammar_placement_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/social_workers_personal_statements.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/seek_thermal_compactpro_ff_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/9290/8963/files/99826303998.pdf
    • https://cdn.shopify.com/s/files/1/0437/1444/5465/files/nesejezikoxek.pdf
    • https://cdn.shopify.com/s/files/1/0431/1924/7514/files/fafikakuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/5243/3557/files/49204696837.pdf
    • https://cdn.shopify.com/s/files/1/0435/3336/9503/files/23554773986.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_off0000660c.bin
91d3de1616ba6a8e5b2cfcf6bb6f6a7ef19158e440ceca877c2d34936dc1b550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 4992 bytes
font_01_sfnt_off00007702.bin
45c95d66fdc4a11e475f5f3711e358e7cb54e57791e7d7fae1e18fc3005d5758		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7702 10148 bytes
font_02_sfnt_off000099b4.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99B4 4324 bytes

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