Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f6a48a5a6fccfc…

MALICIOUS

PDF

60.7 KB Created: 2020-08-04 21:39:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a315cb2a22e64e2d28bee6e9534a357f SHA-1: 540ea2eed966142dae2d38ad4569404c51a2d14e SHA-256: 00f6a48a5a6fccfc7b203f3e79e6b3b31f62a057eda9fc69da4c55f1fce43b9b
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm and a callback phishing lure, suggesting it's designed to redirect users to malicious sites or engage them in a scam. The ML classifier strongly supports the malicious nature of this PDF.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/wb?keyword=neuralgia%20del%20trigemino%20pdf%202015
    • http://files.ninjamagik.com/uploads/1/3/0/8/130874629/jatupisejumelovavog.pdf
    • http://files.angieskonacoffee.com/uploads/1/3/0/7/130775808/fovijutugozirez_surenip_mirexasam_jabewugejop.pdf
    • http://files.hillcountrynatural.com/uploads/1/3/1/4/131437750/8763939.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/doxanel.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8641/files/wotesekarudidoluzadufilug.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/dapup.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/malimurizobuxizefaletib.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3128/files/75741095390.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/6138392178.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/vokotoveminexuzifumunim.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/9010642768.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/41364796120.pdf
    • https://cdn.shopify.com/s/files/1/0437/2869/9553/files/natiruts_sorri_sou_rei_cifra.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8664/files/74571863061.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/tubisujonozajemesovo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7894/files/48915632148.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_off0000ad3e.bin
d85e4f025f77763cf730f994c73a88404bd04a4dfd634c91710f600876946ea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD3E 5604 bytes
font_01_sfnt_off0000c046.bin
e855c63a0c568eecc87860941e715393be3db5af69f68f8233d73e0978b3f7ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC046 10940 bytes

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