Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ddc73065fa4ac34…

MALICIOUS

PDF

47.9 KB Created: 2020-08-04 12:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 554f0011b324361d18afc51fdbbae7e1 SHA-1: 074d8b074a41be490caef6e1b1db07c48cf6d9df SHA-256: 5ddc73065fa4ac348973ce173ff9642ce8695ab0e121b3da90d4b962850192c5
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 external PDF files hosted on various domains. One of these links, https://ttraff.ru/pify?keyword=akbarnama+volume+2+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other benign-looking PDF links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=akbarnama+volume+2+pdf
    • http://files.coloradostateprssa.com/uploads/1/3/1/4/131438002/vemawiri.pdf
    • http://files.astudiofenelonfalls.com/uploads/1/3/1/1/131164402/wewifezo.pdf
    • http://files.blessedredeemerpb.org/uploads/1/3/2/6/132695329/foxifemewidu.pdf
    • http://files.njguardiancanecorso.com/uploads/1/3/1/4/131406688/6427907.pdf
    • http://files.lash-lab.com/uploads/1/3/1/4/131408741/gejejawa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/binomio_cuadrado_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0432/2911/8627/files/vogaxakotor.pdf
    • https://cdn.shopify.com/s/files/1/0433/4537/9478/files/povakak.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/1956246801.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/xomogizanazagajuxetog.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/vofopojusororedisojaxima.pdf
    • https://cdn.shopify.com/s/files/1/0432/4088/2343/files/ruvalosejovabev.pdf
    • https://cdn.shopify.com/s/files/1/0430/2526/8889/files/fazeguwatadomenomo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2520/2325/files/kigemugakif.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3239/files/betizowaviwederovozobed.pdf
    • https://cdn.shopify.com/s/files/1/0432/9914/3838/files/41775991504.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/rojofakosabisasinu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6620/files/nigetolopobofo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/59178027185.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_off00007dab.bin
5b9bea0550f1871af8a3dfac031400a919578421901a9f3b99aa4d8184d7c8fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAB 5392 bytes
font_01_sfnt_off00008ffa.bin
6e7bbd7932a101b67c3da9fbfd9772b2643c7cbdf92b6b921bf3fa8257ce2cd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFA 10036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.