Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea86fafcb841f5f…

MALICIOUS

PDF

43.2 KB Created: 2020-08-25 03:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc8a177a95f1b8e08cf80e616860b4e2 SHA-1: a5d991876b2aafffc26748d77a8b70e5fdcdc4de SHA-256: eea86fafcb841f5f40b948182f86792631e07e3b3208b3c1c8f9a87e947160e4
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Uc browser apk mini jio phone' and a URL that appears to be part of a link farm designed for SEO manipulation. This suggests a phishing or malware distribution attempt, leveraging a lure related to mobile applications. 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.com/pify?keyword=uc+browser+apk++mini+jio+phone
    • http://files.fullfledgedonline.com/uploads/1/3/0/9/130969735/solenipesuxugujopuki.pdf
    • http://kugakaf.saveeastbayhills.org/uploads/1/3/0/8/130814229/fikosaxa_baxazaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/bizamozirega.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/fobufofuvefojexefutozo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6604/files/riretojubanumifaveni.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/kapesivema.pdf
    • https://cdn.shopify.com/s/files/1/0433/2496/5019/files/labiganidufonakajixi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/didokulaligupewa.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/50085982609.pdf
    • https://cdn.shopify.com/s/files/1/0462/2696/4631/files/54033327757.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/vujuxupezu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/govarogokekegukur.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/xarokurufabo.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_off00006ae2.bin
0206e3fabb1a7022940af50ecbd52518717931019565a56e2c01c2e1e89ec792
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE2 5504 bytes
font_01_sfnt_off00007d7c.bin
b1aa146e63caac522b00e4d12b37af3ecec3837cea9984fc37e4f9f680f81cb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7C 10212 bytes