Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab8b11d1f35245d…

MALICIOUS

PDF

44.6 KB Created: 2020-08-18 13:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e889e08aed5d12f3735dbd65c7875f60 SHA-1: 6ada67cc4e42c2cbddf56aa859710ddf8f50e59f SHA-256: fab8b11d1f35245d0958665855b505ac9a45c03a4da17e1ad0dbec8c5b64a6f5
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The ML classifier strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to manipulate search engine results or distribute content broadly. The document body, though heavily obfuscated, contains the malicious URL, indicating its likely purpose is to direct users to harmful sites.

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=eva+rubber+sheet+manufacturer+in+delhi
    • http://mefamo.tagis.pt/uploads/1/3/0/7/130776008/3efcc40.pdf
    • http://files.emmanuelbaptistchurchtn.com/uploads/1/3/1/4/131407572/pibibibetulupav.pdf
    • http://files.asianyoungmusiciansconnection.com/uploads/1/3/0/7/130740625/b6fa3056.pdf
    • http://todoripon.matterbyregina.com/uploads/1/3/1/3/131379578/pupirevevotesos.pdf
    • http://fenukebo.erikbloomquist.com/uploads/1/3/1/3/131384169/panevi-sevuj.pdf
    • http://files.asianyoungmusiciansconnection.com/uploads/1
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/65289882978.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/amazing_grace_jazz_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8090/files/48972632919.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/whats_cloud_formation.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fasexerogetotano.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/mosozedemutobanagepefisip.pdf
    • https://cdn.shopify.com/s/files/1/0430/1268/5977/files/51881065232.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ninitegabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/vewasot.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/39785919465.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066bb.bin
d9cc5e2b38aefe12624d1ddb30f52a51047947124e236d3e589bbe1246ac4411
pdf-font-stream PDF embedded font (sfnt) at offset 0x66BB 5416 bytes
font_01_sfnt_off00007907.bin
1810565dc51824123ae0445df962789afaa59cc18ac870e90b0e0e44ca323b29
pdf-font-stream PDF embedded font (sfnt) at offset 0x7907 14024 bytes