Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1e4c9bc8105b7b…

MALICIOUS

PDF

42.0 KB Created: 2020-08-22 19:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 185b7de9bd9ba9100f75a67a53d637b5 SHA-1: f9d76c0b1f56a5d7ce6e74770fc00e1c21162468 SHA-256: 6b1e4c9bc8105b7bab0420f0590a52fe4769b995fc932e9d11e5ca747a6ec45c
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to 'https://ttraff.ru/pify?keyword=android+apps++but+don%2527+t+install', indicating a likely phishing or scam attempt. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting the primary goal is to redirect the user to malicious infrastructure. No scripts were extracted, but the presence of numerous external links and a malicious redirector strongly suggests a phishing or content-luring attack pattern.

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=android+apps++but+don%2527+t+install
    • http://files.redrootacupuncture.com/uploads/1/3/1/3/131383483/risesujefolusawo.pdf
    • http://xepudu.thesouthernsheshed.com/uploads/1/3/0/7/130739873/799e55.pdf
    • http://tidorulan.echoecological.com/uploads/1/3/0/7/130739826/3407408.pdf
    • http://rekow.slayingwithdice.com/uploads/1/3/1/4/131407057/wedijudolijez_tibobixufar_tugonusos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5021/3274/files/36065059457.pdf
    • https://cdn.shopify.com/s/files/1/0450/0642/2184/files/bogasolumumaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/2824/0794/files/oregon_driver_s_license_number_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/32788467528.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/60946831495.pdf
    • https://cdn.shopify.com/s/files/1/0433/3889/1419/files/97275242267.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/20585680366.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/pofakisolifoduw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5567/files/batexobo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/88943577150.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_off0000662d.bin
bc93ae85ac6ecc366ea6b7efe1b1c72cb936164e33b06705b18832f300c2ffaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x662D 5116 bytes
font_01_sfnt_off00007798.bin
e4fee4da8dce740a18981933ddb0617156d2eadabb10c64c3947fcefb8dbeb84
pdf-font-stream PDF embedded font (sfnt) at offset 0x7798 10420 bytes