Malicious PDF — malware analysis report

Static analysis result for SHA-256 196ffe628d4303b5…

MALICIOUS

PDF

50.7 KB Created: 2020-08-06 00:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ac8e0ae6d29bed4b54e6f84a3c543a9 SHA-1: eb1b09fd2114a2ce8c364a438c90d6515f74abc8 SHA-256: 196ffe628d4303b51d063c2c49ab506eb79f43a3ecf2ca32cfa3c393d57cca87
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or phishing campaign, aiming to direct users to malicious 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.cc/pify?keyword=nie+boska+komedia+greg+pdf
    • http://files.friendsstationery.com/uploads/1/3/2/6/132683334/4373185.pdf
    • http://files.wosherbalhealth.com/uploads/1/3/1/3/131380627/4a1e5475.pdf
    • http://files.americandrillreport.com/uploads/1/3/0/8/130814337/vibejagelezobi.pdf
    • http://files.taxjustice.uk/uploads/1/3/1/3/131384468/jesakibanid.pdf
    • http://files.suzanneensmann.com/uploads/1/3/1/6/131606261/2314488.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/2960/8101/files/pumutevopi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2752/1948/files/49023630599.pdf
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/labutulujofu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/bamigowasozakor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/43038812002.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/44230272036.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2158/files/mowixobugebufugufewaworux.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/9283777286.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/77772721456.pdf
    • https://cdn.shopify.com/s/files/1/0431/5122/9089/files/govoloxodis.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000867f.bin
c504b64f7b05ad02911e073dd3076f153d8102e8b7d89d37c48c3ff287414051
pdf-font-stream PDF embedded font (sfnt) at offset 0x867F 5504 bytes
font_01_sfnt_off00009922.bin
69d42dc9d05b0ff7ec18897ff343c4953427923bd41bdea33c4d7c06cacf04e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9922 11868 bytes