Malicious PDF — malware analysis report

Static analysis result for SHA-256 031812226f1477cc…

MALICIOUS

PDF

33.3 KB Created: 2020-09-01 09:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31419c71dd53069de00f5a1a0054cfe5 SHA-1: fdaee0192249b1f6c33df0e0918451773ee35891 SHA-256: 031812226f1477ccc2e94877eebbd678150bce32e19faabd63176842569a7eb1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same search query as the malicious URL, indicating a lure to trick users into clicking the malicious link. No scripts were extracted, but the presence of embedded URLs and the link farm heuristic strongly suggest a phishing or redirection attack.

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/wix?keyword=john+lennon+happy+christmas+piano+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1297022614.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3279/files/vufekiwesuxujamawofare.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/kripal_singh_automobile_engineering_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/25225857022.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/zebavasupidapudekevuziviz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/remove_duplicate_in_excel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/4124/3814/files/6466055092.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/sims_3_crack.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6202/files/cuadro_medico_asisa_murcia.pdf
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/41287654916.pdf
    • https://cdn.shopify.com/s/files/1/0431/6197/6994/files/64742740905.pdf
    • https://static.usrfiles.com/ugd/19103d_c1023043165348c09fe664ebd6ba117c.pdf
    • https://static.usrfiles.com/ugd/b8c837_157440d2edae43d6b7bdffdd7c5d561d.pdf
    • https://static.usrfiles.com/ugd/19ce5d_08a0073c397342abb9b76399bb2acc26.pdf
    • https://static.usrfiles.com/ugd/0049ca_0e7fdca16491473ebcb27ca458fed3da.pdf
    • https://static.usrfiles.com/ugd/81d6a4_8fcd10e0e2c1419e8a2d2cc93778811d.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_off00004518.bin
3b4bf424f9adabaf7bae2244aac4827ac8a4e0a8cc708c87d4d39bbca40c3f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4518 5264 bytes
font_01_sfnt_off000056db.bin
981c20a5dc3dea64bd557b0cc8740b6bf24d52118133fd2455f2d481fb42ffdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56DB 9684 bytes

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