Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e8f6746b5bd5ac…

MALICIOUS

PDF

40.6 KB Created: 2020-08-15 22:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0fb6c430f0487b4e4ceff2baad337a8 SHA-1: 3bee5fbcf701b0bf8faf8e0f76590c126751052b SHA-256: 64e8f6746b5bd5acc0da2aa1117d4f9851239a003d598b0d079a7017ec9a3781
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/pify?keyword=jio+chat+video+call+apps', points to a known malicious redirector. The document body also contains obfuscated text and URLs, further supporting its malicious intent. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=jio+chat+video+call+apps
    • http://files.michaelmackinomara.com/uploads/1/3/1/4/131453494/1934221.pdf
    • http://files.evolvingminds.net/uploads/1/3/1/0/131071164/d33571.pdf
    • http://files.playfullyrigorous.com/uploads/1/3/1/6/131637484/2569475.pdf
    • http://sapusi.techlitecorp.com/uploads/1/3/1/4/131453249/mekisirigobaxiluwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/tabof.pdf
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/49193679506.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/tuwikasajidanogojedemig.pdf
    • https://cdn.shopify.com/s/files/1/0436/4432/1945/files/chromecast_screensaver_photos.pdf
    • https://cdn.shopify.com/s/files/1/0438/9172/0347/files/minecraft_village_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/8686/3783/files/nevimelowamufemipi.pdf
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/android_developer_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/5608/6696/files/40428978764.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2057/files/3325764407.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1013/files/58211592566.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_off00006106.bin
4a750815f0a2719992ee5ea11ca6f8691da85ae14d8d92cbb44d9e25ed532706
pdf-font-stream PDF embedded font (sfnt) at offset 0x6106 5116 bytes
font_01_sfnt_off00007267.bin
98d276e8620aa58dab96d29460cd4ba5d43ef3602a495b2d925c7f0b03d7028c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7267 10420 bytes