Malicious PDF — malware analysis report

Static analysis result for SHA-256 976cae6044d79691…

MALICIOUS

PDF

35.9 KB Created: 2020-09-03 09:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf0675354a0267be34283f0e4dcbebf2 SHA-1: 33d9fec5df83587da94f2c63bdd8d66d840a7b64 SHA-256: 976cae6044d79691f7f30a0957eff7ac8b089dbd2a17cb6f234a474703e13d27
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector at 'ttraff.me'. This suggests the document is designed to redirect users to potentially harmful content, possibly for phishing or malware distribution. The ML classifier also 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=cyber+hunter+lite+game++apkpure
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/72345806959.pdf
    • https://cdn.shopify.com/s/files/1/0443/4237/8652/files/capital_structure_ratio.pdf
    • https://cdn.shopify.com/s/files/1/0436/7866/2809/files/language_hacking_german_benny_lewis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9126/files/remote_desktop_support_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/dojizugiwikomoregupereral.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/20019387519.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/20556762146.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8284ad6a669425290722b4b9a89f674.pdf
    • https://static.usrfiles.com/ugd/c1c462_9aeae569225a4e07bbd8161deb1e6f4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4101ce32e5ee4723949f5e8fc928234a.pdf
    • https://static.usrfiles.com/ugd/576447_2a3d09d39912475ea8096a9074ddaac3.pdf
    • https://cdn.shopify.com/s/files/1/0432/3557/3919/files/enlargement_worksheet_gcse_tes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/how_asymmetric_information_lead_to_market_failure.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/furilesolakutiluji.pdf
    • https://cdn.shopify.com/s/files/1/0456/4661/0599/files/gorekeruwexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/rexijol.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_off00004f42.bin
437e62496788ac1d1f06c7be2d3cbd91f4aa695def7f2557f83bbfcfa60762e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F42 5264 bytes
font_01_sfnt_off0000610a.bin
266f476c8580c9e94da8c589d2c1212d322e20ac5ea2e4f34ebbc918d7bcf0dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x610A 9868 bytes