Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab09f24e722feda…

MALICIOUS

PDF

32.7 KB Created: 2020-08-15 22:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1245b54003c80d9571539908234d0e9 SHA-1: 5112b4c20826b4cabb627e76ec720703da1913d1 SHA-256: aab09f24e722fedaaa51f22a0183a6bfafb8159bd3c4df9cb66aa5855f507b65
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to shopify domains, but one critical link directs to `https://ttraff.ru/pify?keyword=ankush+raja+new+holi+song+2019`, which is identified as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

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=ankush+raja+new+holi+song+2019
    • http://files.fredkaplanbiographer.com/uploads/1/3/1/8/131856232/zipitekusa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/temagufutobo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/sutowek.pdf
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/zegajopoxagu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/gefafisadiwakerum.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3885/files/79027834953.pdf
    • https://cdn.shopify.com/s/files/1/0429/2847/2220/files/zuvafexobu.pdf
    • https://cdn.shopify.com/s/files/1/0449/0140/0731/files/british_imperialism_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/agresti_franklin_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0434/7697/5768/files/school_attendance_excel_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/57677867409.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0510/files/jadisexirutor.pdf
    • https://cdn.shopify.com/s/files/1/0430/3192/0794/files/learning_how_to_learn_journal.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041d6.bin
9db5be16ce5638584b21f27641e6495d9c6a7b540cbecae71097b51f2bcf8726
pdf-font-stream PDF embedded font (sfnt) at offset 0x41D6 5648 bytes
font_01_sfnt_off0000551f.bin
2ca566037656e64791543729f2c2ace3a0d2907d9fb73a0fda02dedc37f5d505
pdf-font-stream PDF embedded font (sfnt) at offset 0x551F 9632 bytes