Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b1f620fbd4dcc9…

MALICIOUS

PDF

39.6 KB Created: 2020-08-02 19:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1499d1994d2143def0f65d076b63974a SHA-1: 46987b498f9e3af088996e43126637ed60728ddb SHA-256: 48b1f620fbd4dcc91f7004f98148425ec3616fce727627dcfe28f18b85d02619
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search engine results for manuals, with the primary link redirecting to malicious infrastructure. The ML classifier strongly supports maliciousness. The document body, though heavily obfuscated, contains the target URL and references to 'ariens snowblower manual pdf', indicating a lure to trick users into clicking the malicious 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.cc/pify?keyword=ariens+snowblower+manual+pdf
    • http://files.blackstairsconservationconcern.com/uploads/1/3/1/6/131637402/pupedak_sasap_dibelujen_jodisujinilo.pdf
    • http://files.travelsuitsyou.net/uploads/1/3/0/7/130740536/6f250517d9afb.pdf
    • http://files.fortheloveofapet.com/uploads/1/3/1/8/131871864/xutugonaxifapugezixi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3105/1931/files/15522071063.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/2169509946.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/wemawubax.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/85116436650.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88065476392.pdf
    • https://cdn.shopify.com/s/files/1/0434/7179/8436/files/46084843582.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/geraga.pdf
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/65767778025.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/27099886544.pdf
    • https://cdn.shopify.com/s/files/1/0433/9279/4774/files/26908726570.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/vefukaxemagodib.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_off00005d79.bin
4a684230f055cd240831f2418a192b0cab2374ce14ddd8b0c16c202de8a6ce0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D79 5408 bytes
font_01_sfnt_off00006fcf.bin
72ee1d858ca147f32d64bd304f939ad5dfd0c1623853119558a1ef27335f7a8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCF 9992 bytes