Malicious PDF — malware analysis report

Static analysis result for SHA-256 1541f9918d1558dc…

MALICIOUS

PDF

51.6 KB Created: 2020-08-24 02:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74cbb58ea715b7642a784df937b723de SHA-1: 26f2a6481f299e38548a60d3b43d5d56aaa67363 SHA-256: 1541f9918d1558dc6e3f8efe109545b30b3e52ecaa6112fc6e11d8e9148a0fde
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though obfuscated, contains text that appears to be a datasheet title, suggesting a lure. The presence of multiple Shopify URLs, some confirmed benign and others unknown, indicates an attempt to blend malicious links with seemingly legitimate ones. No scripts were extracted, but the overall structure and link analysis strongly suggest 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=cisco+sfp-+10g-+lr+datasheet
    • http://files.im84sports.com/uploads/1/3/1/3/131379578/nanabukep-wepoti-fokane-rizadituwuku.pdf
    • http://legitaj.woytowichdesign.com/uploads/1/3/1/0/131070109/tijoke-bijamomigewiju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/wewexafirudigamivezit.pdf
    • https://cdn.shopify.com/s/files/1/0434/6524/4832/files/83317501636.pdf
    • https://cdn.shopify.com/s/files/1/0436/2849/5001/files/the_killers_sawdust.pdf
    • https://cdn.shopify.com/s/files/1/0461/9275/4839/files/revenaletatekewubinaze.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/82422910520.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/3715209745.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/tudovibinenene.pdf
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/68325002115.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/38499986411.pdf
    • https://cdn.shopify.com/s/files/1/0432/1126/0062/files/23727781811.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/butterflies_images.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_off00007dd6.bin
b638600d4484c415e2ad34c2f6cda85651364dffefeb246e049d271fcf298c09
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD6 5548 bytes
font_01_sfnt_off000090b0.bin
42755e7b0934e975180c8fbbde5534e496e60e790c5316ca2306ad8dc7e6b011
pdf-font-stream PDF embedded font (sfnt) at offset 0x90B0 15988 bytes