Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e48de232a91eec…

MALICIOUS

PDF

59.0 KB Created: 2020-08-22 00:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64b9ec6548a01b4b40776aa28f3b8436 SHA-1: a00640862d112b949e53366ebbbdc0bef10247bb SHA-256: 70e48de232a91eec3d52e10dd936fb73ca18f286c756e90b0979d89442986fed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which are designed to appear as legitimate documents but redirect to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.cc/pify?keyword=haven+and+hearth+sevenless+guide as malicious. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL and several benign-looking Shopify links, suggesting a link farm or redirection scheme.

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=haven+and+hearth+sevenless+guide
    • http://siven.dontworryaboutme.com/uploads/1/3/1/3/131378950/magusesewemido-gaxisuravewur-mukonurar-zoxolikuweriwa.pdf
    • http://files.ogepta.org/uploads/1/3/1/4/131452959/sodaziwoso.pdf
    • http://files.cdhjc.org/uploads/1/3/1/3/131379828/viwelaxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7595/3049/files/laniva.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3131/files/5509994622.pdf
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/auditing_assurance_services_a_systematic_approach_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/4174/1205/files/dubai_tour_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/wamogiboxuli.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/pewizekotawasifutonuju.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4101/files/kogodofumurelede.pdf
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/gepuveniw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/sirupibosenofulepuk.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a81f.bin
1686c11d89f91e502b6ccef12c64ce0e1a54cd60ddd3835e65a8f320ab4a7418
pdf-font-stream PDF embedded font (sfnt) at offset 0xA81F 5108 bytes
font_01_sfnt_off0000b973.bin
8d82679e0eb45e633e77d1674deebf460726ceb91e9b6245edcfde64c2fa1273
pdf-font-stream PDF embedded font (sfnt) at offset 0xB973 11348 bytes