Malicious PDF — malware analysis report

Static analysis result for SHA-256 adfa098d92530ba7…

MALICIOUS

PDF

38.3 KB Created: 2020-08-20 18:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a7b151e1c7bc79a6cc4b471d3c35870 SHA-1: 9d6ac5d73e25a4dda0ebab2a440fda03c9ae8cbc SHA-256: adfa098d92530ba7fed28a4d87f9184774b527b47bf9387bff4b78e453c3612c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains a URL that matches the redirector link. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content through numerous indirect paths. No scripts were extracted from this sample.

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.com/pify?keyword=evil+morty%2527+s+theme+piano+sheet+music
    • http://files.deafcan.org/uploads/1/3/1/3/131397946/dojarakuter.pdf
    • http://files.singingforfuncrowborough.com/uploads/1/3/2/6/132696274/mifetonuwarozo_xikofakesazofax.pdf
    • http://files.lightworkselectricny.com/uploads/1/3/0/7/130775653/jugifiwafoxidineni.pdf
    • http://kiviwila.diannebersea.com/uploads/1/3/0/7/130739173/pivotivolaxemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/platform_technology_examples.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/92673574628.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2943/files/bug_bounty_hunter_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/5729/1169/files/aptitude_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2743/files/menekaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6624/files/ambulance_competition_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8055/files/pogewogowivefiwedoruzixus.pdf
    • https://cdn.shopify.com/s/files/1/0448/3589/7505/files/bangla_natok_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/3526/1085/files/gravely_walk_behind.pdf
    • https://cdn.shopify.com/s/files/1/0432/5235/1144/files/kilepozi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/vukuxidipinukas.pdf
    • https://cdn.shopify.com/s/files/1/0433/8506/1541/files/kuguvizuvozuzadu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b19.bin
fedebeedd8137a51d48822adb2d40545957c24e38d23874e2ea827e19e9736af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B19 5324 bytes
font_01_sfnt_off00005d1e.bin
57eebf0acfe6920b96908d23ed88e5227bd0447c6870e89e521acdda416a25b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1E 14152 bytes

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