Malicious PDF — malware analysis report

Static analysis result for SHA-256 010ff4cbe1d54630…

MALICIOUS

PDF

45.3 KB Created: 2020-08-22 20:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 425a0282d2b80a4c187ec0320e73a8c1 SHA-1: f4411d95f086c6d0d350624596e47759680fae53 SHA-256: 010ff4cbe1d54630384c075563121ac5e1aa9a87b1fc38eb0c5da2138003e56e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users into downloading malware. The document body, though heavily obfuscated, contains text related to 'Smadav antivirus 2018 free with crack', indicating a social engineering pretext for the malicious link. The presence of a large number of external PDF links also suggests an attempt to manipulate search engine rankings to distribute malicious content.

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.com/pify?keyword=smadav+antivirus+2018+free++with+crack
    • http://files.entartetekunstliteraryreview.com/uploads/1/3/2/7/132741144/vofubesuzuti-rapapepedopir.pdf
    • http://demuwab.simplejoys-photography.com/uploads/1/3/1/6/131606968/7110571.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2410/5124/files/12851176951.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/bicycle_dynamo_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/m1_garand_disassembly.pdf
    • https://cdn.shopify.com/s/files/1/0432/6758/8252/files/49769004257.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84602765162.pdf
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/siwag.pdf
    • https://cdn.shopify.com/s/files/1/0438/4276/4962/files/google_camera_android_version.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/millennial_generation_consumer_behavior.pdf
    • https://cdn.shopify.com/s/files/1/0434/0413/2508/files/zapowenudazabedozajeja.pdf
    • https://cdn.shopify.com/s/files/1/0432/0106/9220/files/counseling_theories_and_techniques.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_off00006f73.bin
8d17adf8cadebe5f3d13c6b0ffab49300489fd3bbf8302a404a4427ea4431a13
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F73 6068 bytes
font_01_sfnt_off00008406.bin
1d2ce8d95269751137e4b2d4afca6c22921547fec3591e75b58fab80a19d0f40
pdf-font-stream PDF embedded font (sfnt) at offset 0x8406 10468 bytes