Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1217d136f3f4a4…

MALICIOUS

PDF

105.5 KB Created: 2020-08-21 16:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6786b66fe5c3a5dcf74188456422eb9 SHA-1: eccb6e89159c6946e6c1e0e0523ac419d3c00ed9 SHA-256: 1c1217d136f3f4a465179c69a0fbd510d8c8808f78a432e61898fbfef6ac32be
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the suspicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware.

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.ru/pify?keyword=last+time+a+lobotomy+was+performed
    • http://pidemaw.ethics-based-on-science.com/uploads/1/3/1/3/131398367/godixidizufokuk.pdf
    • http://files.bububijou.com/uploads/1/3/2/6/132695351/6826017.pdf
    • http://vineroge.apeacefulfarewell.com/uploads/1/3/1/3/131378780/darejawamuzigawu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/taus_machine_translation_market_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7177/files/arthropathie_inflammatoire.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/applied_ballistics_long_range_shooting.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/bisefamixivamazoguwiri.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/pejivawadeli.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/damekelajebusujelivi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/luzuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9477/files/venezuela_economic_crisis_explained.pdf
    • https://cdn.shopify.com/s/files/1/0439/9579/1518/files/dibudusutomoniterasu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/83295521300.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/doniwujubu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001517d.bin
6a210b5c2a31b85fbef0f5bd6485dd0b94f1546a3f8b28e2512382a314c2c731
pdf-font-stream PDF embedded font (sfnt) at offset 0x1517D 5144 bytes
font_01_sfnt_off0001630f.bin
9ccf8bbe111080e5adc9e6b98ed7a9819f3619cccc7a8ceb4b8d62edc668810a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1630F 11780 bytes
font_02_sfnt_off00018a4b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x18A4B 4324 bytes