Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf1b6b527d9da104…

MALICIOUS

PDF

49.6 KB Created: 2020-08-18 19:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 093654fb12ce7056dde16a42e70e1487 SHA-1: 3632be5dacbf9a54328eeed1ad0998d64b5754d2 SHA-256: cf1b6b527d9da1044c01298e7ec2a418ade685111c541092f35e5ae0eae835de
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector link pointing to 'ttraff.cc'. Another critical heuristic flags it as a PDF link farm, with many links hosted on cdn.shopify.com. The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains the same redirector URL and a Shopify URL, suggesting a lure or content stuffing for SEO purposes. The primary malicious activity appears to be directing users to potentially harmful content or infrastructure via the 'ttraff.cc' link.

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=banjara+movie+babbu+maan
    • http://files.schoolofthoughtblog.com/uploads/1/3/0/7/130739919/db6cfd1f1496.pdf
    • http://xasev.ethicsgeneral.com/uploads/1/3/1/4/131410007/19bf4b147417.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/halo_ce_cd_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/1841/1417/files/61598715890.pdf
    • https://cdn.shopify.com/s/files/1/0429/2342/5955/files/39161492741.pdf
    • https://cdn.shopify.com/s/files/1/0434/4892/6364/files/xbox_360_minecraft_mods.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7555/files/atopik_dermatit.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6724/files/bamazojisinesazuxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/77733064155.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/livevusimomunipozera.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3381/files/the_fall_of_the_house_of_usher_abridged.pdf
    • https://cdn.shopify.com/s/files/1/0434/4794/3330/files/berserk_of_gluttony_volume_2.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005975.bin
12401b7939e071a394fd37ad6bd2ab22f3bf014845239f15e288f5f95fda5364		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5975 4748 bytes
font_01_sfnt_off00006976.bin
e455a44837bd77241a9fa427773eb6dd759fa1381276cb57c85f1fd0c4ee160e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6976 14248 bytes
font_02_sfnt_off0000963d.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x963D 16164 bytes
font_03_sfnt_off0000ab52.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB52 4324 bytes

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