Malicious PDF — malware analysis report

Static analysis result for SHA-256 4160ea9da6b708e0…

MALICIOUS

PDF

44.9 KB Created: 2020-08-28 11:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dd7a49bf3d78fa08ba3ba6477184642 SHA-1: 3378f26df67931d1a2704cb68b7e4b7288b1405b SHA-256: 4160ea9da6b708e0eb52c7a7026bce0873b6cb9bcf61b8ff7df9a23f40956fe0
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one directing to a known malicious redirector. The document body, though partially corrupted, includes text related to a 'Toyota camry 2012 repair manual' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm heuristic further indicates an attempt to distribute content through multiple external links, likely for SEO poisoning or traffic redirection.

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=toyota+camry+2012+repair+manual
    • http://files.pkpressurekleeninc.com/uploads/1/3/1/4/131409574/zanudegup.pdf
    • https://cdn.shopify.com/s/files/1/0438/1389/6352/files/62837936299.pdf
    • https://cdn.shopify.com/s/files/1/0449/8400/8862/files/cezar_roberto_bitencourt_tratado_de_direito_penal_parte_especial.pdf
    • https://cdn.shopify.com/s/files/1/0439/3598/9915/files/twilight_graphic_novel_volume_2_scri.pdf
    • https://cdn.shopify.com/s/files/1/0435/6017/3717/files/maths_worksheets_for_grade_7_comparing_quantities.pdf
    • https://cdn.shopify.com/s/files/1/0437/4760/6679/files/angry_face_texting.pdf
    • https://cdn.shopify.com/s/files/1/0465/4530/5750/files/purble_place_cake_game_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/3767/1075/files/dikokotarani.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/38690006127.pdf
    • https://cdn.shopify.com/s/files/1/0435/5804/3807/files/regex_credit_card.pdf
    • https://cdn.shopify.com/s/files/1/0432/8361/1801/files/81058836502.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/65993303961.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_off0000657f.bin
0eff011af4256112cfb09a149f3e0f0bca26b90c68f0fce3a154c7923a42ce81
pdf-font-stream PDF embedded font (sfnt) at offset 0x657F 5160 bytes
font_01_sfnt_off000076f7.bin
a0a091fd30d4748a35bc1f3b04a035ed0c2c765fecb12b18864795f823e02d91
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F7 9908 bytes
font_02_sfnt_off00009900.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9900 4324 bytes