Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e45013af1986e91…

MALICIOUS

PDF

36.7 KB Created: 2020-08-30 06:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13b32612d2dde41c35dc6ca29d57feae SHA-1: 121b0df0dc2b714abe1c0b284d119620d0ce961c SHA-256: 2e45013af1986e91da8d59bf7c28f0a0dd3fff7d1423f4ee32db29b4a44f3166
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign Shopify URLs, but one critical link to 'ttraff.cc' which is known malicious redirector infrastructure. The ML classifier strongly indicates maliciousness. The document body, though malformed, contains text related to 'category theory' and the malicious URL, suggesting a lure to a malicious site disguised as a PDF download. 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.cc/wix?keyword=category+theory+and+applications+a+textbook+for+beginners+pdf
    • https://cdn.shopify.com/s/files/1/0452/4094/2753/files/gavokolirunomusavatup.pdf
    • https://cdn.shopify.com/s/files/1/0431/3225/6407/files/long_range_shooting_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0459/1783/1319/files/tuxipukokatevisiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/6628/4446/files/manual_de_epidemiologa_y_salud_pblica_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/9845/5705/files/zakide.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/prayer_before_birth.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/zonamevavi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/40934953618.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/41226185131.pdf
    • https://cdn.shopify.com/s/files/1/0429/0219/2287/files/tijewasopigeg.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6073/files/sevopapuramewobuzinuzi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/rumosuzasonewobaje.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/58746035433.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/velemokim.pdf
    • https://cdn.shopify.com/s/files/1/0438/0911/2226/files/fuzokoladudixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/salofa.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_off0000465f.bin
30b60ffb75b7433a5325e66aa006a762fa22038ba0cd3e75f7388cf79daaa864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x465F 3244 bytes
font_01_sfnt_off000051d7.bin
32332edd7d69b97e73f52a9d3da07780f7f573f3923764340aeee0f53377af9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51D7 5696 bytes
font_02_sfnt_off00006542.bin
53b3279b36a11a58ac6bea3ca7fb327c3cd21b03ca8c20644796cc2a7164e3ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6542 9368 bytes

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