Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab56a33d5bba1746…

MALICIOUS

PDF

35.6 KB Created: 2020-08-05 11:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9d3eb5be35d29a13f14d3ed23d614b4 SHA-1: d7e95fe592200a6579293fc7ba9834880b61c805 SHA-256: ab56a33d5bba1746eadb5fef7f8b88a3aaac5603fedb616ebc3157c26cf2b645
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is part of a link farm designed to deceive users into downloading files. The document body itself contains text related to 'The blue planet 3rd edition pdf download', suggesting a lure to trick users into clicking the malicious link under the guise of a legitimate download. 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=the+blue+planet+3rd+edition+pdf+download
    • http://files.kuwaitikuwait.com/uploads/1/3/0/8/130813614/fusiroxujakobefuzod.pdf
    • http://files.thepoetrypeople.co.nz/uploads/1/3/1/4/131483361/d0140a1a475.pdf
    • http://files.projectovercomeinc.org/uploads/1/3/1/6/131607063/8700662.pdf
    • http://files.kmsclassroomconnection.com/uploads/1/3/2/6/132682884/1c7b81cec1f.pdf
    • http://files.treesurgeonmayo.com/uploads/1/3/2/6/132682758/75b071653aedd4c.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/associative_classification_in_data_mining.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/kiwemotavedakowewadunam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/sorugilejumazizepesudi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/xelaxafuruwazixewo.pdf
    • https://cdn.shopify.com/s/files/1/0439/6358/0574/files/3288279741.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3920/files/fovagifujizulogologexike.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6703/files/bill_winston.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/bijibusetorofikawu.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/kadefuzogovip.pdf
    • https://cdn.shopify.com/s/files/1/0431/0787/7017/files/catholic_encyclopedia_volume_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/charles_bukowski_post_office.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_off00004c63.bin
77082c438e5990c88a87e7763d146cc3b84ec33f14a4421b143cf77cfd24b234
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C63 5296 bytes
font_01_sfnt_off00005e69.bin
71552aebb4fdcb4faf4ad5fbacb137d40311a01748e0fa7fca7d03d11a69480c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E69 10344 bytes