Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1e431a5bc4abc6…

MALICIOUS

PDF

41.0 KB Created: 2020-08-26 16:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfaaaab8c2a3c0c6750016a9f3b32e08 SHA-1: 78dce3ba7af767d6ded0597c2d655ba1a1d7e64a SHA-256: 5c1e431a5bc4abc6685fa9cea2214927b3dc8fedb90601b407a06fea75059541
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. The primary malicious URL identified is https://ttraff.ru/pify?keyword=corel+videostudio+ultimate+x9+serial+number+with+keygen, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other links to PDF files, suggesting an attempt to distribute malware or phish for credentials by luring users with promises of software keygens.

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=corel+videostudio+ultimate+x9+serial+number+with+keygen
    • http://files.communityconnectionsaz.org/uploads/1/3/1/4/131437333/2360383.pdf
    • http://files.thefitanista.com/uploads/1/3/1/3/131398406/059861b603a203.pdf
    • http://kixoga.txokgoldstarmoms.com/uploads/1/3/0/7/130739935/nalekozigu.pdf
    • http://files.kriswiltse.com/uploads/1/3/0/7/130776158/5471275.pdf
    • http://gugeroze.salvatoremallimopiano.org/uploads/1/3/1/4/131406069/4793028.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9037/8901/files/puwafawunutabosazirigoga.pdf
    • https://cdn.shopify.com/s/files/1/0437/7572/1629/files/complete_guitar_chord_poster.pdf
    • https://cdn.shopify.com/s/files/1/0429/1900/2268/files/math_worksheets_converting_percents_to_decimals.pdf
    • https://cdn.shopify.com/s/files/1/0440/8449/4488/files/report_incident_to_police_anonymously.pdf
    • https://cdn.shopify.com/s/files/1/0430/4368/4503/files/sewisejikuvudezabak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/27028514601.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/seditetulumikifu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/saturated_hydrocarbons.pdf
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/kanibukaposakaduzemero.pdf
    • https://cdn.shopify.com/s/files/1/0446/9764/9306/files/merge_sort_in_python.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_off000060c0.bin
97988a7474276074a5c8438b9c476fdec1508a12648aa4e2937f1bd4f8932650		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C0 5828 bytes
font_01_sfnt_off00007478.bin
f52a24180c1419d1743c1e773285a0cf1cb77c62927b1733c72bfd9dc13bd0dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7478 9968 bytes

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