Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6dd14b12a2a8dc…

MALICIOUS

PDF

35.7 KB Created: 2020-08-07 14:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb8d23a6905c54a49640c6066f7426c6 SHA-1: 576baf2eb9d7180daab48f5c50dc32cdce248270 SHA-256: df6dd14b12a2a8dcb5a3011b06a2b10e0fa7a1c1d3c5bfb7c819506acb4d9840
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.cc/pify?keyword=aura+gris+libro+pdf'. This suggests a phishing or malware delivery attempt, masquerading as a book download. The ML classifier strongly supports the malicious verdict.

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=aura+gris+libro+pdf
    • http://files.mazeofevergreen.com/uploads/1/3/1/6/131636589/cbe864.pdf
    • http://files.pakalolochocolate.com/uploads/1/3/2/8/132814949/weretuxujogimunotaju.pdf
    • http://files.theboho.ca/uploads/1/3/0/7/130776131/nitepuwedovix.pdf
    • http://files.ekarabeagles.com/uploads/1/3/0/7/130775515/6130507.pdf
    • http://tabomijo.maddiehulsman.com/uploads/1/3/0/7/130775350/tolojire-duzaf-duvexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96512150342.pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/8999/files/yugioh_arc_v_dubbed.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/zipibafubuwud.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/bhagavad_gita_malayalam_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/basic_english_grammar_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/daxuzofuresizakoxupa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/70009475292.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/xegakanozuxigalodoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/rafagekodupes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/33783135198.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/3952982786.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/analogy_reasoning_question.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kekiwimuzavenomudajelibo.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_off00004ebb.bin
0c17a907cc53df128da30da62a05eaa829be36300a48b7ea18ec68c4635ca011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EBB 5336 bytes
font_01_sfnt_off000060e9.bin
44286ba27c0f58304cd2edcd3a4a62a7e3fb43aa1807c57dc4ed3b13040dffe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E9 9764 bytes

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