Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9f8c1374799acf…

MALICIOUS

PDF

41.9 KB Created: 2020-09-06 04:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f599823cfdd88534dcdc911f313f845 SHA-1: ad4bb6e5b3a6be478a88fba6326f8350d3cf8c2d SHA-256: 7f9f8c1374799acf1d63ef34915d352fb8d57518883c936f82f9be304cf504f0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'Honeywell barcode scanner manual' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm and a critical redirector link firing strongly indicate malicious intent.

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.link/wix?keyword=honeywell+barcode+scanner+1452g+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/adjektivdeklination_bungen_mit_lsungen.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/18711396854.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/66464464955.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/free_infographic_powerpoint_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/68888604253.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/bombay_movie_songs_kuttyweb.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/24123031335.pdf
    • https://static.usrfiles.com/ugd/f63f29_5c30c01a6aa14c5a80e0f95056376260.pdf
    • https://static.usrfiles.com/ugd/3eed2b_9da82d27cd8f426daa1882bd8c5e5014.pdf
    • https://static.usrfiles.com/ugd/b2ba6b_99fa6be8eebb45cfab4fef0a29992407.pdf
    • https://static.usrfiles.com/ugd/d79848_ac623599037b4582914745bfedf0613b.pdf
    • https://static.usrfiles.com/ugd/cb5dea_c9ad1fe3c48d468dbb3e91dd1289658e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b2b338978544c079b0d69c166f3ebbb.pdf
    • https://static.usrfiles.com/ugd/120f26_f1cbf162227b40c98ec6805f9072967f.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_off000064aa.bin
af4a1f3972fbcba8684f48cf70ae4461001f65dfb4960fbbdacfe34fcf2ef5be
pdf-font-stream PDF embedded font (sfnt) at offset 0x64AA 5948 bytes
font_01_sfnt_off000078f8.bin
aff2a7e441bd590cde2026879ccd9800d43845988d4320ae6383b5fd19bc2684
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F8 10104 bytes