Malicious PDF — malware analysis report

Static analysis result for SHA-256 4430441aaa986cbf…

MALICIOUS

PDF

33.5 KB Created: 2020-08-20 04:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9df41b40e67a77f61b899f704494f191 SHA-1: 7086ba3c1ebd489c6a4256db04c9dfe045cff536 SHA-256: 4430441aaa986cbf4bb194bb9b33cbc39ee0494663c08a6c6ffaf166ece417a3
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One of the primary embedded URLs, 'https://ttraff.ru/pify?keyword=body+systems+concept+map+worksheet+answers', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text, though partially corrupted, suggests a lure related to 'body systems concept map worksheet answers', likely to entice users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=body+systems+concept+map+worksheet+answers
    • http://files.mhpps.org/uploads/1/3/0/8/130815664/37938.pdf
    • http://files.appalachianaxeworks.com/uploads/1/3/0/7/130739510/tazufoxe-wodigidowefer-wegufag-fovisikosolusur.pdf
    • http://xowuwu.jingyouecon.com/uploads/1/3/0/7/130740206/tujokuratedexu.pdf
    • http://files.pscandi.com/uploads/1/3/2/6/132681409/libomari_widawatudesa_mamepedu_wijug.pdf
    • https://cdn.shopify.com/s/files/1/0447/8402/5751/files/skf_double_row_cylindrical_roller_bearing_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/batman_under_the_red_hood_script.pdf
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/wolff_in_defense_of_anarchism.pdf
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/17649773066.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0438/3290/1789/files/tcs_maths_aptitude_questions.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/91805812570.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/tapefosus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54313135065.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0167/files/katabilof.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5774/files/93835923406.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_off000045db.bin
64d7457103a8ee312090b0850ffbc89680c5da469e2046fc4fb7eae6385991d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x45DB 5588 bytes
font_01_sfnt_off000058c6.bin
366e9450b5f9a0cb1675f133f88450321dc8d4c4896cd8f22060cd19d870266a
pdf-font-stream PDF embedded font (sfnt) at offset 0x58C6 9432 bytes