Malicious PDF — malware analysis report

Static analysis result for SHA-256 b55e44968d9f89c7…

MALICIOUS

PDF

47.7 KB Created: 2020-08-20 11:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28ddbd6c5991c5bfd9e62ddaaad256cc SHA-1: 3a1e5b8d82e873670684c50ccfc7881a0f1685c8 SHA-256: b55e44968d9f89c77de1856e9f8cc72280a311f88bab9a2eebd0bc3eaa8fde2b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL and references to Android phones, suggesting a lure. The PDF also contains a large number of links to Shopify-hosted PDFs, indicating a potential link farm for SEO poisoning or traffic generation. No scripts were extracted from this sample.

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=android+10+q+alacak+telefonlar+xiaomi
    • http://files.knitch.net/uploads/1/3/1/6/131636946/2284690.pdf
    • http://files.mtbreastfeedingcoalition.com/uploads/1/3/0/8/130874130/8405892.pdf
    • https://cdn.shopify.com/s/files/1/0451/6734/5818/files/85442991341.pdf
    • https://cdn.shopify.com/s/files/1/0432/3482/0251/files/cake_boss_recipe_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/56593362170.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/xepaviminoxapuvaru.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5797/files/kuzakik.pdf
    • https://cdn.shopify.com/s/files/1/0429/0795/9452/files/zorixesabudebu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3759/6580/files/wreck_it_ralph_movie_script.pdf
    • https://cdn.shopify.com/s/files/1/0430/4764/9429/files/guvuzix.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/sefozewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0689/3985/files/53124048163.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e49.bin
3ad5e574619016bc55c1979cab94a32d88fbcbbbc0994e69748f01f9b273630f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E49 5432 bytes
font_01_sfnt_off000070ab.bin
28f8bced6a822c7fb4561c9ebf9c8517481eb8a8f0ae2b50218ffd08851fe4e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x70AB 12844 bytes
font_02_sfnt_off000099b7.bin
cb7fc5f24d1c90f33db255dc75f5312c8a91d8c311fa5c996d1d006a69c486c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x99B7 16384 bytes