Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6fef0d566c23bc…

MALICIOUS

PDF

44.0 KB Created: 2020-08-26 08:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14f97167b52f110086969b8d8bc8e237 SHA-1: 8e282b39200b88e2946d17d37b27ff50735309f6 SHA-256: 2d6fef0d566c23bc180e4fcb45bcf6037a7b06f33e0d30632f91cfe5751b2ff0
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=hum+tumhe+itna+pyar+karenge+mp3+song+download'. This URL is likely used to lure users to a malicious site. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the malicious URL, reinforcing the redirection attempt.

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=hum+tumhe+itna+pyar+karenge+mp3+song+download
    • http://files.planovationsmedia.com/uploads/1/3/2/6/132696111/misekudego.pdf
    • http://files.youthfulrejuvenations.com/uploads/1/3/1/3/131381464/nufemunizuxo-gasibofab-tubenitizade.pdf
    • http://xodugob.missgoob.com/uploads/1/3/0/8/130874285/80808.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/quick_study_guides_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0636/files/63258206893.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3239/files/83506126159.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/66458922288.pdf
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/the_bethesda_handbook_of_clinical_hematology_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/0754/8326/files/mesid.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/1513226337.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/wosizujanotejiwugixa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/10342239276.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/nolobixomimitijije.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/nipevubegobavupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/balancing_chemical_equations_exercises_with_answers.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/
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/wosizuj

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b62.bin
fea3026b2154fcc54c084260515a5dfe93664b7e7d5bf49ff2f928513ab9bcc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B62 5756 bytes
font_01_sfnt_off00006edb.bin
484d6fbba3b221eb89f314737421f8bdf2e41b6b5e2d2b1eb04e19c5948a4826
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDB 16200 bytes