Malicious PDF — malware analysis report

Static analysis result for SHA-256 732b751ece4ae811…

MALICIOUS

PDF

36.7 KB Created: 2020-08-08 07:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73c6105be103b1acedc74ef539c83fb0 SHA-1: b1e3a116b4e582e9e4d05cc30acebe5f23fa24b2 SHA-256: 732b751ece4ae8118c9ce5e6481efbaacbbe96400984350af3b7548afcece2cd
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a search query for "electoral roll pdf". This link, `https://ttraff.cc/wb?keyword=search%20electoral%20roll%20pdf`, leads to known malicious infrastructure, indicating a phishing or scam attempt. The document also hosts a large number of external PDF links, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the presence of a malicious redirector and the ML classifier's high confidence suggest a phishing attack.

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/wb?keyword=search%20electoral%20roll%20pdf
    • http://files.richterslawncare.com/uploads/1/3/1/3/131378932/4877661.pdf
    • http://kuzifu.doodlesnflowers.com/uploads/1/3/2/6/132681670/893349.pdf
    • http://files.baylakecamp.com/uploads/1/3/1/3/131398372/bizilasujepef-pegunemus-vugifefesulimu-wugudazuxatalu.pdf
    • http://files.alphaomegaassociates.com/uploads/1/3/1/3/131379439/2429244.pdf
    • http://files.littleeggandcarrot.com/uploads/1/3/1/4/131406234/9791290.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/mujunune.pdf
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/atul_maheshwari_exam_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/anterograde_tomorrow_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3189/files/rolawabeduposarasipoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2040/2343/files/latatisile.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/69307092003.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/amoebiasis_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/legend_of_zelda_minish_cap_rom.pdf
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/77266525890.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/qaseeda_burda_shareef_book.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_off000042f3.bin
69746cb6ce86add43dc798ff07cdb993bbc16246b2e6be6f32c47485dc573704		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42F3 5168 bytes
font_01_sfnt_off00005482.bin
a0e3c78ff0d0ed8c2339667c0a3d2759d5fbd21c29b257baae2026db2849814b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5482 9360 bytes
font_02_sfnt_off000073e7.bin
2c33dcdb6d4e9e430f65a8fde870548ed5ec32ff5c78f2e76f7ac57f63b1938c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E7 5076 bytes

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