Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5a6a52e7a73db1…

MALICIOUS

PDF

53.2 KB Created: 2020-08-26 16:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3106ed6b0ef570fa6e7fadf24385aeb2 SHA-1: d36053243a1a7f22a6cd77ce570de6a8b6361b5c SHA-256: ea5a6a52e7a73db11fcb90be48902b17a42d447c42441859d7355f2e7c11c279
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=ar+blue+clean+112+pressure+washer+ma'. This indicates the document's primary purpose is to lure the user to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=ar+blue+clean+112+pressure+washer+ma
    • http://files.mmetthey.com/uploads/1/3/1/3/131380870/fowidifowupeg-gamilaxumid-fasekurodib-kekaje.pdf
    • http://toraku.timotuhkanen.com/uploads/1/3/0/9/130970009/tizigapivovumeli.pdf
    • http://files.directdoctors.org/uploads/1/3/1/0/131070336/125763.pdf
    • http://files.advantageauburn.com/uploads/1/3/1/4/131407164/b674e8243a69.pdf
    • http://lopemapuz.nelumplaylist.com/uploads/1/3/1/6/131606349/0638b9932d3.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/62819530011.pdf
    • https://cdn.shopify.com/s/files/1/0430/9988/1639/files/tower_defense_king_mod_apk_unlimited_money.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/44138051317.pdf
    • https://cdn.shopify.com/s/files/1/0438/0445/9168/files/49851273765.pdf
    • https://cdn.shopify.com/s/files/1/0435/4175/8101/files/minecraft_sweden_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9890/files/profenid_gotas_bula_anvisa.pdf
    • https://cdn.shopify.com/s/files/1/0460/2216/4639/files/internet_manager_registration_key_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/puzurimoniluvajenonum.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/13445329168.pdf
    • https://cdn.shopify.com/s/files/1/0433/8165/3655/files/nimopane.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_off000090c0.bin
59c4965ece2a677ab8bad907145b4e0ef97b74368d719d31319a010dfe23a6cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x90C0 5580 bytes
font_01_sfnt_off0000a399.bin
219f842a57dadeefae7ab82bce51b5ee2171d847bc3ccb7977366c8e74561583
pdf-font-stream PDF embedded font (sfnt) at offset 0xA399 10700 bytes