Malicious PDF — malware analysis report

Static analysis result for SHA-256 857f9f59d8028f78…

MALICIOUS

PDF

46.7 KB Created: 2020-08-19 01:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb691dfdce512dc4c163e98bc3f9517b SHA-1: f2e0b4854ca61ec0b2597d94662194cf0252bd68 SHA-256: 857f9f59d8028f789264d643c00d4576e066e9b09f7ae9ad9321744d2c5dc13c
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, disguised with a movie title, indicating a phishing or malware distribution attempt. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect the user to a compromised site or download further malicious content.

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.
  • 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=anniyan+full+movie+in+tamil+hd
    • http://kixeke.innovativepossibilities.org/uploads/1/3/1/3/131383314/xixuliromewon_luxemikudenami_mefuxix.pdf
    • http://files.waynesvillegalleryassociationnc.com/uploads/1/3/1/0/131070216/dobidatilogizo-refigezegepuxig.pdf
    • http://files.loreleilinklater.com/uploads/1/3/0/7/130775475/dazobetemeso-zupelugedon-babajixijojabe-varorurupav.pdf
    • http://paluxosa.alpenviro.com/uploads/1/3/2/6/132695742/897443.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/4586/3067/files/23770938795.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/daisy_1894_bb_gun_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/time_in_ms.pdf
    • https://cdn.shopify.com/s/files/1/0434/6216/4644/files/dewonubawukigemopitetif.pdf
    • https://cdn.shopify.com/s/files/1/0433/1775/6062/files/suromokuxamazotasafezovoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/tenalugokefegaxopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1355/3827/files/fiendish_codex_3.pdf
    • https://cdn.shopify.com/s/files/1/0434/2530/0629/files/sonicwall_vpn_client_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/65764494392.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000494e.bin
f150fc3f497e0f82fa8ac2ce8800f9bf2d92cb0991994d63d2673fb5287f1038		 pdf-font-stream PDF embedded font (sfnt) at offset 0x494E 4904 bytes
font_01_sfnt_off000059d7.bin
b431ecbbac700e8d3e1661e6b1cc43262c9c9f802ba9320404d3d3b5cc4bc4cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59D7 3128 bytes
font_02_sfnt_off0000664d.bin
ba730aa8b07b589f48d07b578c68d5bd3b43e1230160455823d7d39b4ac09754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x664D 10412 bytes
font_03_sfnt_off00008a0a.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0A 16164 bytes
font_04_sfnt_off00009f1f.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1F 4324 bytes

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