Malicious PDF — malware analysis report

Static analysis result for SHA-256 872c87961a458c9d…

MALICIOUS

PDF

89.2 KB Created: 2020-09-05 00:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61598ef5bd280121bdf33baf3c1c919b SHA-1: 799f76b7af0994a67e995ff3942a7c87a8ab2ec9 SHA-256: 872c87961a458c9d4756b415a99d7fba064a2ff00d6d1b29e545c6271367611f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on Shopify. One prominent link, 'https://ttraff.link/wix?keyword=bts+world+call+answers', is flagged as a malicious redirector. This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious sites. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or malware distribution attempt.

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=bts+world+call+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0751/5558/files/digirije.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/fanomakex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3218030698.pdf
    • https://cdn.shopify.com/s/files/1/0428/3429/6988/files/vakosabofetiwurezonilip.pdf
    • https://static.usrfiles.com/ugd/c068f8_33f46dab44144d1cab0c180bf833c31d.pdf
    • https://static.usrfiles.com/ugd/8716ab_a06a8b07c140457f810de184c7e83388.pdf
    • https://static.usrfiles.com/ugd/538d67_3925213ba464427287460b130060a261.pdf
    • https://static.usrfiles.com/ugd/2d797c_3bd1c1d6e9984aeca6ca001e796da68e.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/52024323067.pdf
    • https://cdn.shopify.com/s/files/1/0435/8127/6319/files/12988535445.pdf
    • https://cdn.shopify.com/s/files/1/0463/2749/6859/files/16785562324.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5557/files/71824464950.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/sikilivobobezawaj.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2054b899cf84fc094ad39843c379632.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_643e4af58b3f4fdda6edcaa240399c4c.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001058b.bin
3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1058B 6440 bytes
font_01_sfnt_off0001157f.bin
7dabf70676d4d0c8a0c003caf4bcf564e075097e302436825df8233625b85094		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1157F 5072 bytes
font_02_sfnt_off000126d5.bin
f236852f350bd6648cc69e779d107cde5571c47e670abe5829ea4a5a609b159c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126D5 2672 bytes
font_03_sfnt_off000131dc.bin
e74ff9bd4764531334779401d44c270cced68acd213945256537b2a8f979acbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131DC 10380 bytes

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