Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e340a71b7a3c702…

MALICIOUS

PDF

49.5 KB Created: 2020-08-15 08:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36dc379c739b3adc41f011c25fd81f1a SHA-1: afd8676dd9510c8aa9a25f00e634d228d38e3d97 SHA-256: 2e340a71b7a3c702f1f837e38655ec305e66267b105d61208118c39fc675fe56
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=normal+report+of+lft+blood+test'. This indicates the document's primary purpose is to redirect users to malicious sites. The presence of a large number of embedded links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector. 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.com/pify?keyword=normal+report+of+lft+blood+test
    • http://files.sjhameed.com/uploads/1/3/1/4/131437225/nutebajeritagijuw.pdf
    • http://files.luvmyhats.com/uploads/1/3/1/6/131637357/5303640.pdf
    • http://files.rachelwilliams-animalbehaviour.com/uploads/1/3/2/7/132710601/d56e3503.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/diagenesis_of_sediments.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3496/files/piguxuzoxosapadanifuma.pdf
    • https://cdn.shopify.com/s/files/1/0428/9334/4924/files/academic_essay_example.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/56078697521.pdf
    • https://cdn.shopify.com/s/files/1/0432/1548/7133/files/62566452775.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/hand_tiller_lowes.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/gikimamoge.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/nonelox.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/nomumivupobo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/72522197866.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50306279194.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/bcg_matrix_of_apple.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/80181419229.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/kepidijodowevodaruvujad.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_off0000829a.bin
73cb7f11311001300cd1eed68dba9d04e1aee08d69fc9432a27cafb5b4fbc2a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x829A 5296 bytes
font_01_sfnt_off00009479.bin
dcab3fc6d766a35c6635d67d044f432e086083731e15a1716e03c0919214918a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9479 10884 bytes

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