Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c031a496614c12…

MALICIOUS

PDF

57.3 KB Created: 2020-08-04 20:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1f39af3021beb9b64e853b4979071fd SHA-1: 600744f0930754cd24a02120f4f3920a55908b1c SHA-256: f7c031a496614c1233aa30d239a8e6c5bbde1f998358d9fe9bd6a0cdd693aed4
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/pify?keyword=statistics+meaning+in+tamil+pdf'. This suggests the document is part of a link farm or SEO poisoning scheme, aiming to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=statistics+meaning+in+tamil+pdf
    • http://files.simonbradfieldphotography.com/uploads/1/3/0/7/130740118/2089600.pdf
    • http://files.thecramm.com/uploads/1/3/1/4/131437619/87511.pdf
    • http://files.hermistonraceway.com/uploads/1/3/1/3/131382243/xowatamekijopapaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/transcription_and_translation_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/46991158681.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6392/6174/files/milosivude.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/xulufiweke.pdf
    • https://cdn.shopify.com/s/files/1/0429/6939/9452/files/vakowoleloxuveduruti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lurexemip.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/podute.pdf
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/python3_virtualenv_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/jawijorivazajo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8475/8696/files/nanosapusonipomesiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1463/5165/files/vufolunanuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/vuvofedizaxikuku.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0825/files/rumadenuderoret.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/
    • https://cdn.shopify.com/s/files/1/0433/6392/6174/f

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e93.bin
52470d1dc8b706b059eb25ee3966604d00c8133e924f8f978e023ee648d62573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E93 5480 bytes
font_01_sfnt_off0000a12a.bin
a3a4e70ee62a3c62bcb169a0c157e3dc1f2d4e0ba3b25f38db59adb1da01a592		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA12A 6388 bytes
font_02_sfnt_off0000b3b4.bin
64c206791a00764cb1727497eb0d650ae44b3d39dfff24cebb7be0faa75c1292		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B4 10516 bytes

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