Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1bae3f1f20a206…

MALICIOUS

PDF

40.5 KB Created: 2020-07-28 23:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88b1e388c0a37c8f1043242be48bb718 SHA-1: a24cc208215a1403b63706cf9382ae42bb7e8ab3 SHA-256: 0b1bae3f1f20a206dd7211b399913113abaa84a354b567b97a39069fab40283c
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is flagged as malicious. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files. The document body, though heavily obfuscated, contains text related to a movie title, suggesting a lure to entice users to click the malicious link.

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=narasimham+full+movie+songs
    • http://files.aboverepair.com/uploads/1/3/1/4/131438708/raluni-libobesexirela.pdf
    • http://files.candacehaynes.com/uploads/1/3/1/4/131438071/vavax.pdf
    • http://files.andreanelson.studio/uploads/1/3/1/8/131871690/b02bc.pdf
    • http://files.dairycareaction.org/uploads/1/3/0/8/130814935/8513273.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/lubuwubenijuxisekike.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/69035360246.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/48696080000.pdf
    • https://cdn.shopify.com/s/files/1/0431/7141/4167/files/63169122946.pdf
    • https://cdn.shopify.com/s/files/1/0431/5077/0333/files/miwisire.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/vowunojodukiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6043/5871/files/towukesilamuvonebulutajan.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/varodusi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/rawolusufak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/dutaziwapakoravaj.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_off000061fe.bin
3477ab7256c8b27f72c284d591bb4055918f0fd8d5199bc41e45a224e78eadae
pdf-font-stream PDF embedded font (sfnt) at offset 0x61FE 5012 bytes
font_01_sfnt_off000072e7.bin
693de72ec1b7a3fffa490606b0d17573409b56ace2f857d7a3f69f3dec5c9fc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x72E7 9960 bytes