Malicious PDF — malware analysis report

Static analysis result for SHA-256 056b74b1161932f6…

MALICIOUS

PDF

42.4 KB Created: 2020-08-21 17:20:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccb3333c0b7ef717ca6eaa90da7af93c SHA-1: 67e6957e9ea4f430beaaec28615f3cf3c2804a78 SHA-256: 056b74b1161932f6a3d2b1b7bd259b5bb1532dec8c9e22ef4dbdea4cba09c9db
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=clinical+examination+essentials+4th+edition+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious activity as a search result or resource link. The heuristic firings indicate a deliberate effort to create a link farm, likely for SEO manipulation or to distribute malicious content.

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=clinical+examination+essentials+4th+edition+pdf
    • http://files.thortorgerudcarpentry.com/uploads/1/3/0/7/130738758/pezuzujojitexunetudo.pdf
    • http://benewisak.brmhsjcl.com/uploads/1/3/0/7/130775350/7159512.pdf
    • http://pibijetam.helllomegan.com/uploads/1/3/1/3/131384244/tinuv_bazesevevuwume.pdf
    • http://files.magnolia-gypsy.com/uploads/1/3/2/3/132303009/guzoladix_ruxotovif.pdf
    • http://vobided.wakullagridironclub.com/uploads/1/3/2/3/132302921/ba3778832a9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/free_business_powerpoint_templates_with_animation.pdf
    • https://cdn.shopify.com/s/files/1/0434/2703/7336/files/53089835901.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/mubutifimixag.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/99805883562.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/milogixox.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/warframe_beam_weapons.pdf
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/tokio_myers_bloodstream_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/duxizidejurezajobuxigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/51047342040.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/19540884969.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7372/files/pitman_probability_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2687/files/66454698732.pdf
    • https://cdn.shopify.com/s/files/1/0432/0074/1531/files/20803920092.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_off000064ec.bin
0c0c821952b9825ad327035aad9122842523c30bad5fd9e5f1d3f428f4ccad0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EC 5360 bytes
font_01_sfnt_off00007707.bin
0a168debd7eaf35466516470975238b30ca2abb799cf872cd12ff4101842097b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7707 10876 bytes

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