Malicious PDF — malware analysis report

Static analysis result for SHA-256 049049d44788898b…

MALICIOUS

PDF

44.7 KB Created: 2020-08-07 18:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc024e9e75dfc108d78f241193a0df63 SHA-1: 795646f6cfb60e475be45eca5e0584b9102d16a3 SHA-256: 049049d44788898b215bcf02e7c6060c1e11570dde0e505679aaea3a2cbffbfe
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link and a remote support tool lure, indicating an attempt to trick the user into engaging with potentially harmful software or services. The document body, though heavily obfuscated, contains a URL that points to a redirector, which likely leads to a malicious payload. The presence of numerous external PDF links also suggests a link farm, potentially for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=how+do+you+make+bookmarks+in+pdf
    • http://files.lifelinefamilyenrichment.com/uploads/1/3/0/7/130775848/febakigavomenod.pdf
    • http://files.michharry.org/uploads/1/3/1/3/131398279/fa7b4fa8c8374.pdf
    • http://files.itechtutoring.com/uploads/1/3/1/1/131164542/xodogepofumix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4541/9170/files/46925371857.pdf
    • https://cdn.shopify.com/s/files/1/0429/9777/6543/files/bekejizugema.pdf
    • https://cdn.shopify.com/s/files/1/0438/1641/9488/files/como_funciona_un_aerogenerador_eolico.pdf
    • https://cdn.shopify.com/s/files/1/0436/5638/0574/files/washing_machine_pixelmon.pdf
    • https://cdn.shopify.com/s/files/1/0429/7405/2503/files/negugetorexam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/82926358032.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5637/files/vivagebexugosideg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/guwesimutetalajizobanubel.pdf
    • https://cdn.shopify.com/s/files/1/0434/2520/2332/files/character_development_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/37548203886.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_off00007063.bin
7c12c8ccd23903ab759133ad765ef9830ca572ae425364cfadd35797f7ff9f5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 5512 bytes
font_01_sfnt_off00008316.bin
0d1ff3046456a51688e3465ce4d67af13cac80be951b7507fb0def0b95f05501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8316 10084 bytes

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