Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a4b1736adb3cfb…

MALICIOUS

PDF

51.7 KB Created: 2020-08-05 03:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 984286a3dc4853babfad13ab00b62c4b SHA-1: f8f8d6608a634ce2dba4ed5ed337daeff2190704 SHA-256: 60a4b1736adb3cfbdcbd591d1f08521558f18f1cee3d97700f645e046c171c21
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting an attempt to create a link farm or SEO spam. Crucially, one embedded link redirects to `https://ttraff.ru/pify?keyword=brennan+manning+abba+s+child+pdf`, which is flagged as known malicious redirector infrastructure. The document body itself is heavily obfuscated and contains what appears to be a reference to the malicious URL, indicating a phishing or redirection attempt.

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.ru/pify?keyword=brennan+manning+abba+s+child+pdf
    • http://files.skatecoachkristina.net/uploads/1/3/1/4/131454034/gokotepofuwikad.pdf
    • http://vutonag.physiotherapyequipmentcenter.com/uploads/1/3/0/7/130776046/nukuvugaxizame.pdf
    • http://files.mycountrydanes.com/uploads/1/3/0/8/130874055/tuxojufolamuzalibip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2464/5272/files/behringer_x32_compact_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/5296340492.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/47964091314.pdf
    • https://cdn.shopify.com/s/files/1/0431/9710/4288/files/81160815734.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/56390827743.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/xutil.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6975/files/liter.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2292/files/54494075098.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafon.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/how_to_rename_a_visual_studio_project.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/supebifipamepurebixebuvew.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/19987988093.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_off00008b73.bin
58cce7c6ac0eeb22563540aeaefe9a366f688c47230a9d99f9a73d506a6c9711		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B73 5760 bytes
font_01_sfnt_off00009ee2.bin
7ee840bddd3f06f0abb7f5fa13a55fbb4cc0f81b949f130bcfec3ead38c11468		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE2 10284 bytes

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