Malicious PDF — malware analysis report

Static analysis result for SHA-256 90587d8f1fe1aed1…

MALICIOUS

PDF

42.3 KB Created: 2020-08-19 21:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24ec0c37c8747c71210cca1ae3d51cf1 SHA-1: 7f010a73a99722216f8c1af21537c9a051e95170 SHA-256: 90587d8f1fe1aed109db0ebf1e7430934ece166c28515ebac9300892f974c2ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a malicious URL, disguised as a search result for free PS4 emulator games. This is a common social engineering tactic to trick users into visiting potentially harmful sites. The PDF also contains a large number of embedded links, many of which point to Shopify, likely as part of an SEO-based link farm to improve search engine ranking for the malicious redirector.

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=ps4+emulator+games+for+pc+free
    • http://files.desert-green.org/uploads/1/3/1/8/131856034/wilitatoxagaw_zusalozejunepa_mebod_sugidefa.pdf
    • http://files.lizsandwick.com/uploads/1/3/0/7/130775518/52a8c4.pdf
    • http://vafilok.ellenstamiliodesign.com/uploads/1/3/1/3/131380213/bilaresulif.pdf
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/90854928196.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/das_arabische_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/12187469240.pdf
    • https://cdn.shopify.com/s/files/1/0434/4171/7414/files/wosuvewavukakuguj.pdf
    • https://cdn.shopify.com/s/files/1/0440/3593/2310/files/one_touch_ultra_mini_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/27048499569.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/lokefumatofase.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8389/files/32066024580.pdf
    • https://cdn.shopify.com/s/files/1/0441/1988/3928/files/pusodijipigidurovijama.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jaled.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/wijizo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000677e.bin
53bfedaf31dc0d8effac66a986fd28256b79fc61a169a2d94a55ae3de3385665
pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 5424 bytes
font_01_sfnt_off000079e2.bin
1ba84c63d50b714195dc5552d336c3610cb6e6f92dd3fb421529589a55afc2e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x79E2 10156 bytes