Malicious PDF — malware analysis report

Static analysis result for SHA-256 4415128aecf1e323…

MALICIOUS

PDF

73.4 KB Created: 2020-08-19 02:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9708b7efc283ab15d3d3e8e9762e328 SHA-1: 23877dab627518c2d02693aae847f264b4b12222 SHA-256: 4415128aecf1e32334217ad863d83682ef0c645421951a4cc899c8adee1709d8
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, with a critical heuristic identifying it as a PDF link farm. One of the primary links points to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination and potentially deliver a malicious payload or conduct phishing. The ML classifier also strongly indicated maliciousness. The document body contains the same malicious URL, reinforcing its role as a lure.

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.cc/pify?keyword=bulbul+bole+sun+babul+song
    • http://webudepu.simplyearlyjazz.com/uploads/1/3/0/7/130776611/bufuda.pdf
    • http://files.flatbarskateshop.com/uploads/1/3/1/6/131636654/6867913.pdf
    • http://files.gassingamerica.com/uploads/1/3/1/4/131452958/vopixezixasuv-vexole-zamepu.pdf
    • http://files.wwhsphysics.net/uploads/1/3/2/3/132303310/limiwafufu-jigutozikavunej-vejetabakobe.pdf
    • http://files.pattystewartandassociates.com/uploads/1/3/1/4/131438786/lisupewo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/visual_studio_product_key.pdf
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/pozazedotiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/wurisunufopoxaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5403/0231/files/17858729759.pdf
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/car_racing_game_for_android_phone.pdf
    • https://cdn.shopify.com/s/files/1/0428/2908/6876/files/anlise_sinttica_aplicada.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/63037515943.pdf
    • https://cdn.shopify.com/s/files/1/0430/8316/9943/files/numerologia_cabalistica_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/93391345267.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/81696116965.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4854/files/dms_to_dd.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4750/files/29795150234.pdf
    • https://cdn.shopify.com/s/files/1/0439/8986/0510/files/washington_pa_dmv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/togotere.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_off00008e8e.bin
3104a5c00cd06ad542eb7053564151a3eccbf36ca4ccf1b3259bf7844c23db39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8E 6364 bytes
font_01_sfnt_off0000a45d.bin
4b80894f378e31bc241bb6fa82d82aa8a74d1b823408f1b0a72d871778435d9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA45D 4944 bytes
font_02_sfnt_off0000b53e.bin
d1e4a213e41d5df76b6ac4dbf5a092fc2b188ac7a3f63d9940d42fba7eea0974		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB53E 18676 bytes
font_03_sfnt_off0000eee3.bin
5393e078d46d3b12353b9eff707c84f504e0fb857d2d716a957cdeaa5499f527		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE3 18136 bytes
font_04_sfnt_off000109ff.bin
60f4a9854b6b988b1b7dc8e8df3ffe7853e950d063525539d85c7673927eb428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109FF 3452 bytes

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