Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ec78e3ce8637f3…

MALICIOUS

PDF

45.2 KB Created: 2020-08-16 18:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35552957b8ef828e14e48534a36e9ce1 SHA-1: 390e27fc3597dec2e102138d8340daaf733b219e SHA-256: 11ec78e3ce8637f3bf546e901da4c0a153da6faa4d2a06d9d95ea3fde4e53f14
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious redirector. The document body contains text related to downloading games, suggesting a lure to trick users into visiting these links.

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=bully+anniversary+edition+game++for+android
    • http://ramegeb.sc4hffameatgoatproject.com/uploads/1/3/2/8/132814930/zilun.pdf
    • http://timanij.thepygmygoatclubofireland.com/uploads/1/3/0/8/130813840/ravabifokilotir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0440/0126/3766/files/our_world_phonics.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/artificial_neural_network_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0431/5778/2694/files/73346334150.pdf
    • https://cdn.shopify.com/s/files/1/0438/8611/7019/files/38236836395.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/famulumisideri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46150969179.pdf
    • https://cdn.shopify.com/s/files/1/0429/8060/6111/files/14615281321.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/famulogux.pdf
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/honda_gcv160_spark_plug.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/zegomowijonasozo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/vurifomobo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4234/6907/files/veriverop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c36.bin
61b8f7481cb564be3e078055de44b23b90065e9f44ca9d9750cf1859a314bb8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C36 5440 bytes
font_01_sfnt_off00006eae.bin
4203833980475f9763b29244c9a414d942a477f0a621b8a067847a6e1188ad11
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAE 2152 bytes
font_02_sfnt_off0000790a.bin
538b78c6842bd6355cbc2a1efb399e4482e2c84c21e06e00cf77214dc6490d62
pdf-font-stream PDF embedded font (sfnt) at offset 0x790A 15128 bytes