Malicious PDF — malware analysis report

Static analysis result for SHA-256 33e0377ef123790a…

MALICIOUS

PDF

45.2 KB Created: 2020-09-02 03:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d334ce326f9eba7fe472516a87a8f17 SHA-1: dca26bf5d20af80eba8632d0cd326b8533edea71 SHA-256: 33e0377ef123790a4be2bddd1d239fed90a68e9f658f3c7b84dccf85b3495541
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for free sheet music, which is a common tactic for advance-fee scams. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wix?keyword=the+final+countdown+trumpet+sheet+music+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_1bf73c9469a149e29844297101e16ec4.pdf
    • https://static.usrfiles.com/ugd/95089d_04f547391a1b4d67beed31d74a09db0e.pdf
    • https://static.usrfiles.com/ugd/9df9d6_ed59bed37d2e468caa7363ac74b75f06.pdf
    • https://static.usrfiles.com/ugd/9e41f0_55da5d51d8fc4288ad872f3fdcaa3c84.pdf
    • https://static.usrfiles.com/ugd/dcf9ad_4e449423db70425f907e6537c0f0e340.pdf
    • https://static.usrfiles.com/ugd/882da0_9dc84690254e4b9e82a44a5fa94eaf00.pdf
    • https://static.usrfiles.com/ugd/b8c837_f45e0c67bf6d4144944e76151606cdb0.pdf
    • https://cdn.shopify.com/s/files/1/0431/7842/6534/files/4216180505.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/chinese_date_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/d20_modern_weapons_locker_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/brisbane_lions_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7967/files/94685020037.pdf
    • https://cdn.shopify.com/s/files/1/0454/2693/3916/files/68250434102.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/patriot_chipper_shredder_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/anemia_usu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/michael_jackson_thriller_album_download_zip.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_off00007167.bin
55287ac7da06791604f603beae936669bb2a9d290f1a4a6f9a443bdb779fc42f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7167 5436 bytes
font_01_sfnt_off000083ca.bin
acd63c0a58fa366378bcf557668fad78135f3c5b1e74428f8c284f15f74b8dde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83CA 10440 bytes

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