Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d03ae29df277fe…

MALICIOUS

PDF

52.9 KB Created: 2020-08-30 20:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e484df82bcb809c22f5eab739f1d875 SHA-1: 29b15d3ff9d891aab4b0643b4670891b54ba9d21 SHA-256: c5d03ae29df277fec9c7162621551ff1ff14126b7fd32d1f54488a1f4e2b339d
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to 'ttraff.com', likely intended to lead users to a phishing or malware distribution site. The document body and embedded links suggest a lure related to popular content, aiming to trick users into clicking the malicious URL. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=read+50+shades+of+grey+online+free+no+download
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/twanna_turner_melby.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/duvixufotagijeva.pdf
    • https://cdn.shopify.com/s/files/1/0435/0689/2960/files/tekirujifolobepiridizetus.pdf
    • https://cdn.shopify.com/s/files/1/0434/4469/9288/files/27238595890.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0469/files/kitijubanidunokinep.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/26687847766.pdf
    • https://cdn.shopify.com/s/files/1/0436/1319/2349/files/lozilosufopo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1914/9216/files/rajasthan_board_10th_question_paper_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0443/6888/7964/files/60096011438.pdf
    • https://static.usrfiles.com/ugd/b7306e_c29d95edcd904bc7928ed6cc8dba6fab.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee9db509fe3b41b8b98ae1688667e26e.pdf
    • https://static.usrfiles.com/ugd/97aff7_33763ce3619e42eabd54835c6423a554.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_off0000838c.bin
b431fc07f402a23dd243f53ff92c6dee3b55ffe3b227df92afc9a0c81d8bd7e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x838C 5344 bytes
font_01_sfnt_off000095c3.bin
533ccdf3d19635832fc59843c7ab26bf97953f99977da244368ad4bc9cbf5b29
pdf-font-stream PDF embedded font (sfnt) at offset 0x95C3 10240 bytes
font_02_sfnt_off0000b8c5.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C5 4324 bytes