Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a05ed764aa08d48…

MALICIOUS

PDF

68.2 KB Created: 2020-08-11 19:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13e2e88a0ae76ea0f66ed5393f824fd2 SHA-1: 05528ae4a4e0b8a1cc48091a2097eb6d9b00b995 SHA-256: 8a05ed764aa08d4852e55eaedc50ffd78a720f23de3b6653f1b537af342d5e7e
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure for a 'business intelligence for dummies pdf free'. The primary malicious IOC is the redirector URL, which is likely used to serve further malicious content or phishing pages.

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=business+intelligence+for+dummies+pdf+free
    • http://files.mohscb.com/uploads/1/3/0/7/130739322/9225314.pdf
    • http://files.almarshellindustries.com/uploads/1/3/1/4/131409717/8641594.pdf
    • http://wovanege.halesforklift.com/uploads/1/3/1/0/131070374/xesibi_vikade_lolemixi_duwevokitofi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/tovum.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/76046720815.pdf
    • https://cdn.shopify.com/s/files/1/0437/7831/0295/files/fukovavaguk.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3439/files/fifasifas.pdf
    • https://cdn.shopify.com/s/files/1/0431/7098/8188/files/gufivinivopoxifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/65438717538.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/radevilonapura.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/jiwigitod.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/7402410227.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/toxaxivasobovovud.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7920/files/face_detection_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/belly_fat_reducing_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9328/files/pobiselexojovozatukizamaw.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_off0000ce68.bin
77cf99a3b30926c82173dea80b4dbee2ae27d4336d546ed3b6268457fbb81093
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE68 5312 bytes
font_01_sfnt_off0000e067.bin
6f3e4327cc8831314fd21a3a910fc5e44b45f592bea01de3ea185d6eb02d1642
pdf-font-stream PDF embedded font (sfnt) at offset 0xE067 10192 bytes