Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5f031345062c97…

MALICIOUS

PDF

60.0 KB Created: 2020-08-30 08:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2dea95facad8f4c616f1776c0364b2e SHA-1: 6aeae66520b72639957223d5732b28b127a16c67 SHA-256: fb5f031345062c97243a07e77ddd2bb7c7a6c1368c6aa5eb441b35388fe429a1
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though partially corrupted, includes the same URL and text suggesting a lure for 'free hoyle card games download full version'. This indicates an attempt to redirect users to a malicious site, likely for software distribution or further compromise. The ML classifier also strongly flagged this PDF as malicious.

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=free+hoyle+card+games+download+full+version
    • https://static.usrfiles.com/ugd/48d9a1_6d0c5e8df49c456cb2c728f0dbd370fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd4d65ea4f9444d2a5a347f9902067be.pdf
    • https://static.usrfiles.com/ugd/d3758e_2ae9a3c95bad48b6bb8db1fbd001a638.pdf
    • https://static.usrfiles.com/ugd/60933b_e20a418a8a0044d88adbe96511387999.pdf
    • https://cdn.shopify.com/s/files/1/0438/9660/2779/files/naputovotako.pdf
    • https://cdn.shopify.com/s/files/1/0431/9523/6513/files/mac_android_studio_gradle.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2612/files/kewejimutadenotoxuro.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/panatidupunuza.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/failure_data_analysis_reliability_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/75665763036.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/bewinowivenulodosoxo.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
stream_005_off0000a6ee.bin
b5b91ba6b395415c280678f98ba3f31b91480859e69384a23e55360d6de3843c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA6EE 26420 bytes
font_00_sfnt_off0000703b.bin
3437130341f230d5adcb39a19148929a56ca6f056817cff2a51cc0331bc12c15
pdf-font-stream PDF embedded font (sfnt) at offset 0x703B 5444 bytes
font_01_sfnt_off000082b0.bin
b4e4ac1b99bb778fe49581cedcc7d84530d9aa9f5324c6b83a0048aa0849f192
pdf-font-stream PDF embedded font (sfnt) at offset 0x82B0 10588 bytes
font_03_sfnt_off0000d503.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xD503 4324 bytes