Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd422dd8cce060b…

MALICIOUS

PDF

65.5 KB Created: 2020-08-09 17:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdded6ee106b3a16db215c74b78ec58f SHA-1: b3e265c5c0936990686f621bfec16326bfa0aff2 SHA-256: fbd422dd8cce060b033b0a3d35c85d880b1d22c5bb5d104cc8939eac4d035f6d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The PDF contains numerous embedded links, many of which point to SEO-optimized PDF files hosted on Shopify. One critical heuristic indicates a malicious redirector link to 'ttraff.com', which is likely used to funnel victims to further malicious content. The document body itself contains garbled text but includes the target URL, suggesting a lure related to academic documents. No scripts were extracted, but the PDF structure and link farm indicate a delivery mechanism for malicious content.

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/pify?keyword=andhra+university+degree+syllabus+2020+17+pdf
    • http://vafatuta.simonogdenworks.com/uploads/1/3/2/6/132682090/vejujumatatijir_danetudedeg.pdf
    • http://files.globalmusicsong.com/uploads/1/3/0/8/130874058/9538455.pdf
    • http://files.ljcosmetics.com/uploads/1/3/1/4/131407012/7163959.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9288/files/fixurijimeguvolepoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9528/files/wovosefudovukavike.pdf
    • https://cdn.shopify.com/s/files/1/0435/3628/5860/files/56338133761.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/australian_aboriginal_religion.pdf
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/zizudegesupawuf.pdf
    • https://cdn.shopify.com/s/files/1/0444/2993/4758/files/practical_english_usage_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/29840158315.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6165/files/the_blue_planet_3rd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/kuror.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/jasc_paint_shop_pro.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/circle_tangent_theorems.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000837a.bin
22db44f76dc35aebed54c9b5a1ad193980a4cd67621e60695c18ab7ab83dd784		 pdf-font-stream PDF embedded font (sfnt) at offset 0x837A 6000 bytes
font_01_sfnt_off000097f1.bin
1f94191f41e15e5c60beb269d352e7f57d2029955bb6a6264ecaf00b476512a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97F1 3872 bytes
font_02_sfnt_off0000a6fa.bin
7bb91423d63eb6bd7c2657278979848d60b7d38679106ec23dbd755ba6ab3d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6FA 2320 bytes
font_03_sfnt_off0000b14a.bin
6cd2e8717e1ab3213470d5d5170254855a84a5e2317c6f6384838c4cb69cfb5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB14A 15964 bytes
font_04_sfnt_off0000e251.bin
4362e686776cae9b5e877a8e5de4a1ff5ae9966626bcf1046762b8e3a01bbea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE251 16224 bytes

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