Malicious PDF — malware analysis report

Static analysis result for SHA-256 113d05b786386909…

MALICIOUS

PDF

38.3 KB Created: 2020-08-13 00:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daa88c7afc6c23a850a4d29de18d0152 SHA-1: f7643a1fc4a01aceb7e820a3458f4563634f19e4 SHA-256: 113d05b786386909329b4159798f0c13b53a407e0e9f2a2a17b25cebee06a466
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=learn+python+the+hard+way+3+pdf+free'. This suggests the document is designed to direct users to malicious infrastructure, likely for phishing or malware distribution. 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.ru/pify?keyword=learn+python+the+hard+way+3+pdf+free
    • http://files.number1hair.co.uk/uploads/1/3/2/7/132740352/duwesemi.pdf
    • http://files.whipplecreekadventurers.com/uploads/1/3/2/6/132695755/kafiga_xuxodapetapuji.pdf
    • http://files.ntclaytarget.org.au/uploads/1/3/1/8/131858791/9884409.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/world_map_black_and_white.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9319/files/fesogobuduvujujenegamudus.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/wusosapamuginom.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/5289773989.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/89126348563.pdf
    • https://cdn.shopify.com/s/files/1/0430/4797/7114/files/belajar_tajwid_untuk_pemula.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/4th_grade_math_textbook_mcgraw_hill.pdf
    • https://cdn.shopify.com/s/files/1/0430/3421/4561/files/72889811001.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0375/files/86277828208.pdf
    • https://cdn.shopify.com/s/files/1/0436/2695/4905/files/vubafubegatunazejan.pdf
    • https://cdn.shopify.com/s/files/1/0437/3938/1912/files/gta_5_props.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_off00004b6f.bin
837f02ce1905de43961fbd3b773f4a73bc1223861721ac61840a7bb08ccbc532		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6F 4960 bytes
font_01_sfnt_off00005c5c.bin
4862d6e457b525ef2f8f91ab5c3958c6c691cc65ec133eb56bdfd6449ef54493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5C 10128 bytes
font_02_sfnt_off00007e4b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4B 4324 bytes

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