Malicious PDF — malware analysis report

Static analysis result for SHA-256 48eca6733355bbf2…

MALICIOUS

PDF

42.2 KB Created: 2020-08-30 22:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a9042ad0833a1b4fc8515db93a2359c SHA-1: 947d7d57b3533fb1d6e0b4274a9b5778ffae2041 SHA-256: 48eca6733355bbf2df12356051a73b5333d570dffdc82f8d6d7906eba208a26f
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector (ttraff.cc). The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated but contains the malicious URL, suggesting a lure or redirection attempt.

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=jorge+antonio+torres+vazquez
    • https://cdn.shopify.com/s/files/1/0438/2218/6653/files/pubiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7767/2868/files/cervical_cancer_screening_and_prevention.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/argumentative_essay_structure.pdf
    • https://cdn.shopify.com/s/files/1/0446/2706/7043/files/averroes_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/bimapara.pdf
    • https://static.usrfiles.com/ugd/d162e3_7d3f375b949f4a179b6ec68220ab3b60.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/1206488860.pdf
    • https://cdn.shopify.com/s/files/1/0449/3528/2856/files/baby_boss_movie_free_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/sonny_2_hacked.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6bac8e5f8da4609a8e6fa286ba4fc92.pdf
    • https://static.usrfiles.com/ugd/b8c837_c051c2ad37c547e49deeae9af09b1a8c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e303e836fcfc4286a25534a1be6a9e77.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ee8675375dc43979a5a34d93c91d2d8.pdf
    • https://static.usrfiles.com/ugd/83b1b3_b88c6147eb2b448d86cb1ee7829cf6d2.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_off000068a1.bin
ba9e9c8db9d8dd4610ba78393eac814830d037f347a125204da854be30d8d65e
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A1 5044 bytes
font_01_sfnt_off000079e6.bin
f0eac78d70178a2b36d59fc4fafb9623483be0c7174f482d37f0f0c8a49678c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x79E6 9980 bytes