Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ead71944255ab19…

MALICIOUS

PDF

34.9 KB Created: 2020-08-29 22:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d789cc5888a2c37f75a76b28c9b458a SHA-1: 92978addb7f71c30444da88560c5ba04860d97ea SHA-256: 5ead71944255ab19a4893aee44f7187cc6b70de7244d5668be4aa50ff471c13c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Bangor maine hotel deals' and the malicious URL, suggesting a phishing or scam attempt. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination.

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.com/wix?keyword=bangor+maine+hotel+deals
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/fractions_worksheets_2nd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5888/files/6403470432.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/rowerebetenuzalebowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/fotonazugesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/vawovigapijowebutok.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ca535b32b6c4548aac972c41b2ac955.pdf
    • https://cdn.shopify.com/s/files/1/0428/3216/7068/files/pinewoji.pdf
    • https://cdn.shopify.com/s/files/1/0429/1565/9942/files/metro_station_map_delhi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8605/3527/files/superdry_sandals_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/22441201752.pdf
    • https://cdn.shopify.com/s/files/1/0429/0369/9615/files/32102864155.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/ableton_live_manual_9.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/80672336273.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/chiari_malformation_decompression_icd_10.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_off000049d9.bin
e532e6ea04d86f4214ffb8de2cd88d4e4d617b85a1d55e2f5498db1f9fea2043
pdf-font-stream PDF embedded font (sfnt) at offset 0x49D9 5288 bytes
font_01_sfnt_off00005b9d.bin
eb4e620aeb3c7e3e56ff6a9b98632002a734e6fc1619f01997023a295e82f1de
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9D 10380 bytes