Malicious PDF — malware analysis report

Static analysis result for SHA-256 17fedcef247b505d…

MALICIOUS

PDF

73.9 KB Created: 2020-08-21 22:32:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e176e9a6edffeb1e875c8410d865c4ac SHA-1: 2a3da2141742bbef623470442f0e876fa82d7ae5 SHA-256: 17fedcef247b505d155cfba4d3e78cad64b2d324464e8fab0fa9a5d6adb6e86f
154 Risk Score

Malware Insights

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

The sample is a PDF that contains numerous embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, however, leads to a known malicious redirector (ttraff.ru). This suggests the PDF is designed to direct users to malicious infrastructure, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure and embedded links strongly indicate a malicious intent.

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=baldi%2527+s+basics+game
    • http://files.livelaughketo.com/uploads/1/3/1/1/131164425/pebebiwezuni_pokosim.pdf
    • http://saziw.alysonjill.com/uploads/1/3/1/4/131455158/wukunujofuwiguvejixu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0956/4064/files/17889358235.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/gemilejipotap.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/paxifotuwopexufumedepenur.pdf
    • https://cdn.shopify.com/s/files/1/0436/7892/4953/files/16939792842.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/penajoze.pdf
    • https://cdn.shopify.com/s/files/1/0434/4260/2140/files/verujogofofupijofimi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6963/4715/files/45676650023.pdf
    • https://cdn.shopify.com/s/files/1/0429/6087/9772/files/82889220931.pdf
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/3761470080.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7064/files/womens_white_platform_tennis_shoes.pdf
    • https://cdn.shopify.com/s/files/1/0437/2473/4613/files/65698973268.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_off0000e41f.bin
ea3d9c0377a2fd81cc23b3d1998336ef9b8226a5427bddf9e53176bb674e5712
pdf-font-stream PDF embedded font (sfnt) at offset 0xE41F 5384 bytes
font_01_sfnt_off0000f65d.bin
0764a4a71aa5ff55927877db074d3cd51fc03c0c7f88b04c759b085a5ff9c7db
pdf-font-stream PDF embedded font (sfnt) at offset 0xF65D 10680 bytes