Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2d0bbb2cfb2ca7…

MALICIOUS

PDF

54.4 KB Created: 2020-09-06 01:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2589477713d37a3dfd2f1657878dd45f SHA-1: 7f98d64161a978c2a0245a132fbaeb96275eb223 SHA-256: 7c2d0bbb2cfb2ca73ec466d5ccf2b968fe9becb7810315744c6916fa1173842c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL, 'https://ttraff.me/wix?keyword=antimatter+dimensions+fix+infinity+android', is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a lure to external content. The ML classifier strongly indicated maliciousness.

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.me/wix?keyword=antimatter+dimensions+fix+infinity+android
    • https://static.usrfiles.com/ugd/e948c1_1bba556de6144c80b17b1d85b953e175.pdf
    • https://static.usrfiles.com/ugd/cafc24_54b261af6d4d47cc814e4aa9274f625d.pdf
    • https://static.usrfiles.com/ugd/d38238_dfefeb883ab544fa811dd2675e9b4cac.pdf
    • https://static.usrfiles.com/ugd/87a178_0da83ff5b89644d981e100b3ef89bb63.pdf
    • https://static.usrfiles.com/ugd/b910ae_d907e0eda21542969d0a03ec00dba9cc.pdf
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/63994950185.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7409/files/c_c_road_estimate.pdf
    • https://cdn.shopify.com/s/files/1/0435/3766/2103/files/breach_of_contract_cases.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87745409623.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6119/files/41420962263.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/aptitude_test_questions_and_answers_for_freshers_tcs.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/zebuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/xegiterosatel.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/kirepefolo.pdf
    • https://static.usrfiles.com/ugd/a0905b_e5ac4a07d1704def811c8c68673419de.pdf
    • https://static.usrfiles.com/ugd/a48928_69f7e2568745490580bd5bfcd1bfd703.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_off00008f85.bin
5ca5c2b33162deafae0e6071d7e426c6bb84e0ca0901734f7446a6f22566e0dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F85 5180 bytes
font_01_sfnt_off0000a118.bin
86a12c8ccbd709d4621f44c33cc8d4e843ca32992f6e1a3800d8b50bda6dfbc3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA118 13764 bytes