Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e15649612906b3…

MALICIOUS

PDF

75.1 KB Created: 2020-08-07 14:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c830e593636b10059465c3960207c37b SHA-1: e5da3aa22a4179611eadfe04748b29914972037f SHA-256: 55e15649612906b39340c651c197da4aecc618aee04435940c8fb4792c18e25b
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a PDF link farm designed to manipulate search engine results. One of the primary links, presented as a worksheet answer key, redirects to a known malicious domain (ttraff.com). This suggests the document's primary purpose is to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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/wb?keyword=molecules%20and%20compounds%20worksheet%20answer%20key
    • http://files.artwithperry.com/uploads/1/3/2/6/132695418/7578025.pdf
    • http://files.uplift.ccsdtitle1.org/uploads/1/3/1/6/131606169/8711873.pdf
    • http://files.beautifulworldandme.com/uploads/1/3/0/7/130740017/xagijijawezev_duwipitovosex.pdf
    • http://files.loblollylabradors.com/uploads/1/3/1/8/131856743/tepufiru.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0375/files/35807816553.pdf
    • https://cdn.shopify.com/s/files/1/0431/2511/2988/files/70222786080.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/zarogemopav.pdf
    • https://cdn.shopify.com/s/files/1/0433/8676/5475/files/66354950557.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/72294594580.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/gamubixonegozonuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/gopaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/7526/2869/files/zojaliloro.pdf
    • https://cdn.shopify.com/s/files/1/0429/5449/0012/files/murupanokawivodedarufewu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7193/files/63320279650.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/48497013997.pdf
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/lenewegitasazoninovesudu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/python_interview_questions_for_data_science.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_off0000d6e6.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E6 2828 bytes
font_01_sfnt_off0000e0e0.bin
b94a44a04d46b2481eb59d54dcbce05b0623b098e15796aaeefd16ee15165b5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E0 5576 bytes
font_02_sfnt_off0000f3ca.bin
8ee24df90a291366afc9008fbfcf95c2e3de8e183eb69ab8cd91f4e9c368bf6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CA 12600 bytes

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