Malicious PDF — malware analysis report

Static analysis result for SHA-256 863521b00dab33e1…

MALICIOUS

PDF

56.0 KB Created: 2020-08-30 02:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efc98d2128c1ce160de0f0023014c3cd SHA-1: 219471f31fafb8440b190246262c6ae6472029a4 SHA-256: 863521b00dab33e1fe8d8862002143e9d961991909ddea5bf7389551ba622a0c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a search result for an academic document. The document body contains obfuscated text and the URL itself, suggesting a lure to a phishing or malware distribution site. The presence of numerous Shopify links, while mostly benign, indicates a potential link farm for SEO poisoning. No scripts were extracted, limiting the analysis of direct payload execution.

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=al+kitaab+part+2+answer+key+pdf
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/82803575335.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0736/files/gepadab.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/sijowikenigisivasokap.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/84455159002.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/rs3_range_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9023/1974/files/voxikagizujelufisekovu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/javorobex.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/98577326551.pdf
    • https://cdn.shopify.com/s/files/1/0433/4010/3845/files/encyclopedia_of_automotive_engineering_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/movawozumola.pdf
    • https://static.usrfiles.com/ugd/b8c837_47290f84890a4e0d8e292dde9666bc21.pdf
    • https://static.usrfiles.com/ugd/b8c837_84aa15f310db454fb859f21775e70940.pdf
    • https://static.usrfiles.com/ugd/ade4e6_e91d29eb49374ea7a0bcd911bbb18517.pdf
    • https://static.usrfiles.com/ugd/269bb8_31cf696d415c41bca84ef645748da5d4.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcd4a41a79af447bb24ddede2b7f64e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb300e67e18847b8bad37b61f7f30ea1.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b392e50b92442a1ba649909610dc163.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_006_off0000acbc.bin
f8214e7a33e92625f65082af4bca7126679d7eafe18247e86458507170a1bcaf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xACBC 16716 bytes
font_00_sfnt_off0000751d.bin
461dc2d5e68c9d35bbb3a6e0f2a76940d47641de8f47c490d6b85d0c5bfc7040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751D 5232 bytes
font_01_sfnt_off000086fa.bin
e1739faed68320ad9f579a26819b94611d232506a91bada0d3d9417953818c01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86FA 11736 bytes
font_03_sfnt_off0000c40a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC40A 4324 bytes

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