Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf552c4f4c6370be…

MALICIOUS

PDF

54.2 KB Created: 2020-08-19 10:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 179b800ea79f4c965967c756f1fe1790 SHA-1: fa50ad558863d6f9fafb49710c69f289c0216951 SHA-256: cf552c4f4c6370be72b3bf9ff676bed4bcba3eb46ae6daf97b605c664fd2c859
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=rename+android+studio+project+name'. This URL is embedded within the document body, suggesting a social engineering lure to trick the user into clicking it. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on cdn.shopify.com, likely for SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious.

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=rename+android+studio+project+name
    • http://files.eastasiair.com/uploads/1/3/0/9/130969305/be0b0f99a.pdf
    • http://files.pemichoral.org/uploads/1/3/0/7/130775518/8082395.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/pharrell_in_my_mind_zip.pdf
    • https://cdn.shopify.com/s/files/1/0432/2017/2957/files/voxuvizekojebukes.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/autocad_plant_3d_piping_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/jirijososobevulujujikamek.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/xefovom.pdf
    • https://cdn.shopify.com/s/files/1/0432/2993/7832/files/10590701002.pdf
    • https://cdn.shopify.com/s/files/1/0448/1590/9026/files/bluebeard_vonnegut.pdf
    • https://cdn.shopify.com/s/files/1/0435/7845/8275/files/feature_article_example_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8822/files/8230949245.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/61322812368.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/58686930219.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4049/files/29009178402.pdf
    • https://cdn.shopify.com/s/files/1/0435/6872/6171/files/wokedubikiwivada.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081dd.bin
461cbd76b1e273b79906579601a4c2c5725c05c5a4393b5e09030e3df85158bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81DD 5152 bytes
font_01_sfnt_off00009349.bin
5e28837fe5dafed7bfe54f4f5ea7161411fcea88d0db89675b811d0bf619e289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9349 13080 bytes
font_02_sfnt_off0000bd78.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD78 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.