Malicious PDF — malware analysis report

Static analysis result for SHA-256 883574c34ad026d4…

MALICIOUS

PDF

48.6 KB Created: 2020-08-03 09:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9892ae7ab2904ee189aa87a0ce87a395 SHA-1: e4b0a568e077b9e32d0437bb525272ea04a33a01 SHA-256: 883574c34ad026d462a25b5768ada45a560210244db544e368f89cbc00ea7765
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=southwest+airlines+check+in+online', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and references to other PDFs hosted on Shopify, suggesting a link farm or redirection scheme. The primary goal appears to be directing users to malicious infrastructure under the guise of a legitimate service.

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=southwest+airlines+check+in+online
    • http://files.blackdovecreative.com/uploads/1/3/0/9/130969061/karelilexege_dotigumi_muxaxorok.pdf
    • http://files.alzglassandiron.com/uploads/1/3/1/8/131872238/muludusi.pdf
    • http://files.txstudentcivics.org/uploads/1/3/1/8/131857041/3271080.pdf
    • http://files.dchudphotography.com/uploads/1/3/0/9/130969247/fajumevemipebig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/multiples_of_58.pdf
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/nidedixavibukirupopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2295/8248/files/xijixor.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4814/files/26326995945.pdf
    • https://cdn.shopify.com/s/files/1/0434/4132/4184/files/tewazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6974/files/fotaxukaselasoxegagoparo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5018/files/23323804503.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/98528054535.pdf
    • https://cdn.shopify.com/s/files/1/0433/7546/0515/files/45756763108.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/xisinufeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/2712/8735/files/wakaveke.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_off00007fee.bin
a6771b9b5379371dcd325dd2436ac1591d87fe0d3291ea386b5e1238d612f254
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEE 5148 bytes
font_01_sfnt_off0000917b.bin
76ab9a287aa58de969404d91d1902d205ca64fd308cd10017547dc3c39f19b67
pdf-font-stream PDF embedded font (sfnt) at offset 0x917B 10480 bytes