Malicious PDF — malware analysis report

Static analysis result for SHA-256 02327554fe039b6c…

MALICIOUS

PDF

57.0 KB Created: 2020-08-22 00:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7bc1518abf8c846f8ed769f3a2b219c SHA-1: 8522dad41412ceb3a509d3c8a32680e7c02867a1 SHA-256: 02327554fe039b6c222c3d7bec9321b4d4f4f6a546caafc0a9644dfbc3093711
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a URL that appears to be part of the link farm, suggesting 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.cc/pify?keyword=angularjs+convert+form+data+to+json
    • http://files.bikramstjohns.com/uploads/1/3/1/4/131453133/2af34f3fba6.pdf
    • http://files.thecountryboutiquefl.com/uploads/1/3/0/8/130874588/zenonupa.pdf
    • http://files.actioncomputerservice.com/uploads/1/3/1/4/131482931/fafuruxegagufa_lenokogazeraziw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/dalubopedoladowurigazow.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/clicker_heros_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/hero_bike_spare_parts_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6695/files/rsum_bel_ami_maupassant.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/92859714914.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/sales_and_marketing_books.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/tajur.pdf
    • https://cdn.shopify.com/s/files/1/0447/9015/3365/files/44867369066.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4056/files/betobewokinowawawajimu.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_off00009643.bin
a5f2224b68b0f8ae5c7764a71f4b912f65c1f6f0973aba1d951d6e7c0e7ea09f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9643 5464 bytes
font_01_sfnt_off0000a8cd.bin
02a197c7110a69b7b6304a94b1e47d81b0d3cd8b0e638665ba94836dc76451c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8CD 14232 bytes