Malicious PDF — malware analysis report

Static analysis result for SHA-256 402dbe1b936e009d…

MALICIOUS

PDF

46.6 KB Created: 2020-08-10 13:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a2d70aabe828228cf773ad2f390031b SHA-1: 8ae068fefcd98af120abc0622a738ea3a80dc404 SHA-256: 402dbe1b936e009dec7f7a7bf7ba4e2bd1ec5c1540a6e73f9de507b8402031b6
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a document about "characteristics of millennials in the workplace". The document also hosts a large number of links to other PDFs on Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=characteristics+of+millennials+in+the+workplace+pdf
    • http://files.lactationconsultantathome.com/uploads/1/3/1/8/131871799/tuduxikexe.pdf
    • http://files.jacksandjillspreschool.com/uploads/1/3/0/7/130740617/mamawizunop.pdf
    • http://files.bowlssouthampton.org.uk/uploads/1/3/0/7/130775916/2bc85.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/sebifenifopafazenopigez.pdf
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/tadapomigomobozafosebudu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/zubenarisomesodivaxof.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/tozinoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/0315/0499/files/nokoxodetukeloxuzelut.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/lonofirikeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/winalololabevefufe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/mudarajudoguxirute.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/rakow.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/nozitigamovizubesow.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/92639944355.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/dusozelusedanebukugudofap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069f0.bin
62f91db68c048b0b17f3b4688790d7d03f5319bc296eab7f2499b6f580e06b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F0 5364 bytes
font_01_sfnt_off00007c16.bin
1131363807cf6194f9c4e30bfd6824baea3ddd6dc6813aa04fcc78c63b4a47f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C16 10128 bytes
font_02_sfnt_off00009ea1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA1 4324 bytes

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