Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2db1abd9050b12…

MALICIOUS

PDF

48.5 KB Created: 2020-08-17 13:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56cda719a6b55767e922cea3d2baa082 SHA-1: 0dc3ade2ff8e58134fbdb60421aafbefa975aea1 SHA-256: 5c2db1abd9050b1288154453e6dc414d7cb25b08142583feb384dc1384645ae7
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a URL that appears to be a lure for resume templates, likely intended to trick users into clicking through to malicious sites. 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.cc/pify?keyword=best+resume+templates+google+docs
    • http://files.massagetherapyrelax.com/uploads/1/3/0/8/130874211/lowedixetime_difakojo.pdf
    • http://files.chardoncommunityactionteam.org/uploads/1/3/1/3/131384018/pugotut-newifuniz.pdf
    • http://files.minedlandrehab.com.au/uploads/1/3/2/3/132303378/xalixumanekafo.pdf
    • http://files.portageresourceguide.com/uploads/1/3/1/6/131606644/8719065.pdf
    • http://xikap.gesikpt.com/uploads/1/3/0/7/130740480/kepojizev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/aeneid_fitzgerald.pdf
    • https://cdn.shopify.com/s/files/1/0431/6561/4234/files/nosidexorulirukoxetug.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3479/files/ferotofajeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/mufemu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/jozefutavidoxef.pdf
    • https://cdn.shopify.com/s/files/1/0440/6365/4040/files/advertising_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/rig_veda_malayalam_translation_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1773/files/consolidated_undrained_triaxial_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/academic_performance_sample_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0003/7527/files/angular_2_cli_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/subenovitunavikewenogas.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/wordly_wise_3000_book_11_lesson_5_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/zivotufewepubixetefexewa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f42.bin
12c86d83e17d25b4db745c55cf6c07d321d851b7c07f06f4da158299a0d5edb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F42 5440 bytes
font_01_sfnt_off000091a7.bin
bad8d3f25dad211c9993ccdb35f6feb5b595d3e2a7111a6736446634b5506605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91A7 10140 bytes

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