Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b2f8fcd625ede5…

MALICIOUS

PDF

36.3 KB Created: 2020-08-22 22:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 206d6d8d97b9d306c16431c9189b14b1 SHA-1: be66da9c5e871ce5c779743b034d4e26f5866376 SHA-256: f4b2f8fcd625ede51219a50c074d5606a1705b1dd1aef04e6b4f6ae138d2c983
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. This suggests a phishing or scam attempt, using a lure of craft-related files to entice clicks. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=3d+decoupage+sheets+christmas
    • http://files.mrsrturner.com/uploads/1/3/2/7/132712315/suruletoziritido.pdf
    • http://files.militarywivessurvivalguide.com/uploads/1/3/0/7/130775646/popudadada-katewurire.pdf
    • http://files.2ndgebirgsjager.com/uploads/1/3/1/3/131379384/2904628.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6693/files/38300361765.pdf
    • https://cdn.shopify.com/s/files/1/0437/0232/1307/files/85944396035.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/siravelokujilojagizij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6726/files/wunex.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/apa_standard_reference_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/anatomia_arterias_cerebrales.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_off00004d1f.bin
6cecf94790d191ad8d61ed95c27f39c3d4648078201cef816104dbb205d2f248		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D1F 5524 bytes
font_01_sfnt_off00005fb7.bin
003ec0e5687087a6d1e3c5d286676afb2054be9bc7cbb6abcd6b81ea441b393c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB7 11052 bytes

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