Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ec87483d25f831…

MALICIOUS

PDF

35.9 KB Created: 2020-08-04 21:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4957988e2450d02687c39b0f21d28225 SHA-1: 38787b79f1a78db596b521422309f858c27330b6 SHA-256: 67ec87483d25f83188f20182c10ea9092d7613b6a6f1b03d773fa115b337c5fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary purpose of the document is to redirect users to malicious sites, likely for further exploitation or phishing.

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=you+better+watch+out+lyrics+pdf
    • http://xopover.lifeofasouthernwoman.com/uploads/1/3/1/6/131637136/dabuxezetage.pdf
    • http://files.woundedveteransfoundation.com/uploads/1/3/0/8/130813514/jowab-mabuzan-dowonarilafe-segibuxamozepi.pdf
    • http://files.jamiemacpherson.com/uploads/1/3/0/7/130740517/sejokugesedisu.pdf
    • http://files.meinradrottweilers.com.au/uploads/1/3/1/4/131407796/4141642.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/kojaselimevadupet.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/grateful_dead_terrapin_station_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/vim_shortcuts.pdf
    • https://cdn.shopify.com/s/files/1/0434/8215/3112/files/gedekomo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/pifuvalivobugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/giwebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4727/files/11853936183.pdf
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/72292066410.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6983/files/38539987851.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/dewenosuxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/44440023431.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_off00004d53.bin
b1bb62f08f551a5cc65bcf7342d1d8bdc8c90d68a1f9ce1789997382d104258f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D53 5540 bytes
font_01_sfnt_off00006034.bin
0c3328c84ed5cb6c2b96b758885054d069897c57d52716a3ec3c7bfbebec9b06
pdf-font-stream PDF embedded font (sfnt) at offset 0x6034 10148 bytes