Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8104462b3387de…

MALICIOUS

PDF

51.0 KB Created: 2020-08-02 01:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2ed26d2622f4cd3bf591903b23ed6aa SHA-1: e0133d8e96da01d5e650d73a1505c4a34392c0da SHA-256: fd8104462b3387de729987f31d362844e9e251fa9028271230bc8765bcc4cb49
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. This suggests the document's primary purpose is to lure users to malicious sites. The presence of a large link farm, even with some benign-looking Shopify URLs, points towards a strategy of obscuring the malicious destination among many others. 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/pify?keyword=payne+ac+unit
    • http://files.endtimefaithchurch.com/uploads/1/3/0/9/130969598/kumitetolemop_gujegifaxebuxa_ridupene_tetebenelaxi.pdf
    • http://files.dnaleatherwa.com/uploads/1/3/0/7/130738814/8327209.pdf
    • http://files.antelopealpacas.com/uploads/1/3/1/4/131437276/ae0e3.pdf
    • http://files.marbeauxarts.com/uploads/1/3/1/6/131637224/7020635.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/55091769258.pdf
    • https://cdn.shopify.com/s/files/1/0428/4294/7750/files/tusebutajisikolagisina.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5876/files/vanezuruwesomawuvofaka.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/zotezalivakawiwodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41557636134.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/xasoluwilo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3214/0186/files/savogovigerewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7828/7513/files/luvevetadilubinojaxalumad.pdf
    • https://cdn.shopify.com/s/files/1/0437/6389/2376/files/mudolodoxurixajumow.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/dowebotuwibekapojosaziful.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/91887816927.pdf
    • https://cdn.shopify.com/s/files/1/0432/8626/6016/files/2637078046.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_off00007fa3.bin
db4ec03cc225bfc0bb994e11db932f4c4576d2f39cad2bcb0dd0ad84b0ea4817		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA3 4360 bytes
font_01_sfnt_off00008e80.bin
f89916c05793dbe81861c6f63cf09c6d9147990ebfad488613851c86313186d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E80 10180 bytes
font_02_sfnt_off0000b148.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB148 4324 bytes

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