Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49a53893981e15d…

MALICIOUS

PDF

51.6 KB Created: 2020-08-30 06:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edc79c6cd0891aadf5e4bc515208f21a SHA-1: 8f21468ac6542d69b8e31d90c3f7a23a7632b3b2 SHA-256: e49a53893981e15d03b8cf2b47e1c535bb62e76465f75de73789552eb10ec30e
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.ru). The majority of links point to PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of numerous external links supports this assessment.

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.ru/wix?keyword=devanados+de+un+motor
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/golinulitovomirilowapoj.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/88096602878.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/xss_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/9770/1018/files/ket_sample_test.pdf
    • https://cdn.shopify.com/s/files/1/0440/7489/3477/files/52149602083.pdf
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/alter_ego_francese.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/akbar_birbal_stories_in_english_with_moral.pdf
    • https://static.usrfiles.com/ugd/43d598_7fe7fa26f6954bab861806e128441521.pdf
    • https://static.usrfiles.com/ugd/dc98cc_a34bf1c1fe2c4e0fbe207f9e19ca4ce9.pdf
    • https://static.usrfiles.com/ugd/2c8d66_8013c5daf4c545ca91ba86e6ca402fd7.pdf
    • https://static.usrfiles.com/ugd/930050_fd9ad4ebd00444aaa4d8b74628d6e68c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b72dee6326534a7fa73e2601425d7c25.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc2c3690156841729add3e999934dfc9.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068fd.bin
de0f077aa691186515d30979c57fab77d46fa9f262ce4615431fd655aa21bbb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FD 4832 bytes
font_01_sfnt_off00007955.bin
9095eda91bbebf4be138ae77d7a75facd5824696de55f2210bad6a503e7c1f18
pdf-font-stream PDF embedded font (sfnt) at offset 0x7955 10824 bytes
font_02_sfnt_off00009cc5.bin
5355995778af6fea050508ce4debc46bc2ba7deab687ac039556469e1bec84fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC5 16064 bytes
font_03_sfnt_off0000b166.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xB166 4324 bytes