Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b6c0cdd53b449f3…

MALICIOUS

PDF

42.3 KB Created: 2020-08-19 01:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b54902ef65331b1e9930d1ab61db42de SHA-1: ed5d6da5b2cf5afdcdefdafdc1b87c4999a60faa SHA-256: 0b6c0cdd53b449f393934f997e3ffb967fce31f290f2ab4580b8aa70720d31cb
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The document body itself contains the URL 'https://ttraff.cc/pify?keyword=anlagendeckungsgrad+1+und+2+formel', which is also listed as a malicious redirector. The presence of a large number of external links, many hosted on Shopify, suggests a link farm or a phishing attempt to direct users to malicious content.

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=anlagendeckungsgrad+1+und+2+formel
    • http://files.anewmakeup.com/uploads/1/3/2/6/132681576/lewubusawazoza.pdf
    • http://files.yetiarts.org/uploads/1/3/0/7/130776407/f2d493a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9171/3443/files/epsxe_best_sound_plugin.pdf
    • https://cdn.shopify.com/s/files/1/0438/1809/0653/files/zisupowubopim.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/algebra_1_volume_1_teacher_s_edition.pdf
    • https://cdn.shopify.com/s/files/1/0454/5177/2056/files/34665821056.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/19553253595.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0767/files/pevuwakifud.pdf
    • https://cdn.shopify.com/s/files/1/0431/4572/4055/files/35065507187.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84712881745.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/27019136977.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/xalusopopelirafeditijazat.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/wobiboxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7170/8065/files/pharmacotherapy_casebook_9th.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_off00005afd.bin
9f9ae79e476266b9f59e0c40065e62054998fc6417fc7832178b855503f3f70c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AFD 5580 bytes
font_01_sfnt_off00006de2.bin
a76ec14ccf38fa1929cbdaf2916a6bcd675572d3383e50b23e385f9525e1d8d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE2 14328 bytes