Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1c44443c8cbe9f…

MALICIOUS

PDF

44.3 KB Created: 2020-08-02 07:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25cd67b086cc939d4b5a52029f1b024b SHA-1: e5f04906f58bddd0647d1c423c2527e30e900a72 SHA-256: 2e1c44443c8cbe9f42eeea6db9b004cb1cf23e3d1d40d4cd926e457f05db8405
154 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, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Maxxforce 7 service manual' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly indicates 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.cc/pify?keyword=maxxforce+7+service+manual+pdf
    • http://files.gilberthighchoir.com/uploads/1/3/1/4/131409755/b736a2d66a5f901.pdf
    • http://files.bydesignholistichealth.com/uploads/1/3/1/3/131380263/f90a8d52.pdf
    • http://files.petersknifeshop.ch/uploads/1/3/1/4/131454012/cd19e2207c8.pdf
    • http://files.wavelengthscounselling.ca/uploads/1/3/1/4/131406558/fuxuki.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/nimususobejuxiniji.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/buxaterovamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/tedetitimikexitur.pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/xatosedewodi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/potigukurovepiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/denixobizikegebawuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/93303343846.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/rivetogipugojesakudavikam.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6090/files/lisevuned.pdf
    • https://cdn.shopify.com/s/files/1/0432/2669/3789/files/92321913005.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/28585467180.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_off00005f84.bin
e1b76c48ee701ef021c3e0dbc50a052b33f46984464cf28e3fce22162a83deb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F84 5516 bytes
font_01_sfnt_off00007246.bin
d8e4b7f44dfb66ea49c7f1cefd345a391fade3fb548cc17de4cdbf151663dabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7246 6068 bytes
font_02_sfnt_off000081f7.bin
c3a8cfca3469787eebee75eb89063425dcfbb33ef07f4cd2554a35f085b9ec13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F7 10080 bytes

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