Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64bb946707f5624…

MALICIOUS

PDF

36.7 KB Created: 2020-08-31 15:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df1ea2f36443ea7334c4c401dd0bbf68 SHA-1: 87d128b3635766f09b24176a44e323eff7844ead SHA-256: f64bb946707f5624ff70d2a604b824185c0792d08fd195bffd40e17fbfe78dba
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Nfl week 9 printable pick sheet' and a URL that aligns with the malicious redirector. The PDF_SEO_LINK_FARM heuristic further suggests a pattern of hosting numerous links, likely for obfuscation or to spread 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.ru/pify?keyword=nfl+week+9+printable+pick+sheet
    • https://static.usrfiles.com/ugd/77941b_bdd95ff8b84c4dc3aa02c596f041fc84.pdf
    • https://static.usrfiles.com/ugd/b8c837_daf4ec05f5bf402faf6d38e30f2777ea.pdf
    • https://static.usrfiles.com/ugd/b91566_9098d16fa49e4bd099cc115e3c0f8db2.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/narasimha_video_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/9977/3341/files/brother_printer_drivers_dcp-_t510w.pdf
    • https://cdn.shopify.com/s/files/1/0439/3625/2072/files/balancing_equations_practice_worksheet_class_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/64301810757.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/car_game_full_video.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d928d30a28b4f8c87529791b03cfff4.pdf
    • https://static.usrfiles.com/ugd/be19e1_b649b50f8a394eddb02c30267bb87135.pdf
    • https://static.usrfiles.com/ugd/b8c837_6109d0da593947988d5a3197125eb307.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_off000051d3.bin
ded540351ac69c25aa8254dfb13e898593cfb22f41ac0bd7a4f7bbdf6d47bee1
pdf-font-stream PDF embedded font (sfnt) at offset 0x51D3 5524 bytes
font_01_sfnt_off000064a9.bin
734a07c9ca849a146bcf8fced0f0b8d79a2bb082fc93c6e8d9b958540d6b53b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 9884 bytes