Malicious PDF — malware analysis report

Static analysis result for SHA-256 521de265734b2886…

MALICIOUS

PDF

42.0 KB Created: 2020-08-19 12:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 215c39a3554e4f617a71a9338e9208cb SHA-1: 1f9e24dab1e9a1fe720d79b660bcbde93c598b02 SHA-256: 521de265734b2886e569d98c3c4565b7545b45427013583cf9139c49495b4e6e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com', while another indicated a PDF link farm hosted on Shopify. The document body contains garbled text, suggesting it is not intended for direct user consumption but rather to host these links.

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.com/pify?keyword=bitdefender+mobile+security+review+android
    • http://pipid.drjohncasteele.com/uploads/1/3/1/4/131482933/desipubid_medako_nepum.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7614/files/nulupukadana.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/bamafamadusumuzilat.pdf
    • https://cdn.shopify.com/s/files/1/0438/7497/5912/files/portland_oregon_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/nakadetupekapaluvorutu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/cephalosporin_mechanism_of_action.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/como_aprender_a_desenhar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3831/files/54450171656.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/rabuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6137/9226/files/birigasunusevawarot.pdf
    • https://cdn.shopify.com/s/files/1/0437/5055/5799/files/minecraft_pewdiepie_seed.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/berinazitosume.pdf
    • https://cdn.shopify.com/s/files/1/0434/0413/2508/files/waroromovojube.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_off000066fc.bin
dd8c01596c7cdb92c9f242b9b510d8d858ff5125e432b25cb1a170b020daeb16
pdf-font-stream PDF embedded font (sfnt) at offset 0x66FC 5612 bytes
font_01_sfnt_off00007a09.bin
295e7f318e3b0d5bd2151c60a38fb7daefa5ca5c6d421a0b098a48b678e4f8f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A09 9776 bytes