Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e038a0f4fec93a…

MALICIOUS

PDF

40.6 KB Created: 2020-08-27 19:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cb94ee028282d3bcb446ae3a6adaafd SHA-1: 980d52b6b1b3c2010d8d5a3eb9c999725988e970 SHA-256: f3e038a0f4fec93abbab5d6c4feec8e7003067727b3d6ee584a000673b374d32
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.cc/pify?keyword=the+legacy+of+totalitarianism+in+a+tundra. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of numerous links, including the malicious one, suggests a lure to external malicious content.

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=the+legacy+of+totalitarianism+in+a+tundra
    • http://petojuxov.jennajordanart.com/uploads/1/3/0/8/130874493/7881958.pdf
    • http://tunonide.peacepassage.ca/uploads/1/3/1/4/131406149/5815294.pdf
    • http://wodorapo.executivecareercoachinstitute.com/uploads/1/3/0/7/130775085/jixilawo-buseseban-lavabepegepek-boxuki.pdf
    • http://wefep.thamilkdrop.com/uploads/1/3/0/8/130873826/likazoxub-muliwog-jufepamusevivi-lepazoja.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/77951487345.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/malayalam_kambi_katha.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/business_environment_text_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/52408534879.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/xovijal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/pebanunupuvubedaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7333/files/20756974267.pdf
    • https://cdn.shopify.com/s/files/1/0435/5384/9499/files/nintendo_3ds_emulator_roms_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/dejegafosujijumab.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_off00005d3c.bin
085ad09c91d02437f51a4331b208cd121ef1b1a42c02ae67da09d872ec62e64d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3C 5484 bytes
font_01_sfnt_off00006fc2.bin
0c71bb3d01a3fad3ba73d99bff2757c5d9d68964b439aa4100cdd0fcaf6d1bbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC2 10604 bytes