Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec6751559a15357…

MALICIOUS

PDF

39.9 KB Created: 2020-08-25 00:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3475dd912f6973fc6e5e68b565bb34f SHA-1: b0cea003db6874cd6969721e909e960106e96b8f SHA-256: 4ec6751559a15357b68a31998ba33f3d1365793f9a82028465a5473e1863eeeb
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates that a link within the PDF redirects to known malicious infrastructure at 'ttraff.cc'. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be corrupted or obfuscated, but the presence of the URL 'https://ttraff.cc/pify?keyword=bowers+and+wilkins+px7+manual' suggests a lure related to product manuals, likely leading to a phishing or malware download site.

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=bowers+and+wilkins+px7+manual
    • http://files.edsworldwide.org/uploads/1/3/2/7/132740320/sotilemiz-gukixedesimujar-bevulas-lativeponeji.pdf
    • http://sudunesa.thequestofjz.com/uploads/1/3/0/8/130814229/koninoxawibipop_bakukarelema_sukadawilex_bipadozebozoga.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/32874917975.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/gekatu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/sagepukumufub.pdf
    • https://cdn.shopify.com/s/files/1/0437/8420/8545/files/waltzing_matilda_chords.pdf
    • https://cdn.shopify.com/s/files/1/0431/5090/1402/files/vudobolejin.pdf
    • https://cdn.shopify.com/s/files/1/0429/3020/8924/files/68830855494.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/sudumotudafeze.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2803/files/92499971208.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/88032583275.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1088/files/behringer_deepmind_6_manual.pdf
    • https://cdn.shopify.com/s/files/1/0460/2278/7231/files/aashiqui_2_movie_in_tamilyogi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/45243887649.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_off00005c8b.bin
f1ea45aa3a213b39e18f5ab29e083c9f4711b96976e3469bfcabb593195f5711
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8B 5456 bytes
font_01_sfnt_off00006f1e.bin
7257c8eb70143b81c06abae7260c145589fa7312c39a5ef3f67a5287a9672044
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1E 10020 bytes