Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe9886370f1f842d…

MALICIOUS

PDF

40.4 KB Created: 2020-08-22 19:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16b61f0764cfaf03b9923b54971ebb4f SHA-1: 740a51745883963eaa30b592d86d80372135c7a1 SHA-256: fe9886370f1f842d3c111a507584662cc5340bc3edcf2d2cd8bfb156e234d5d5
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Suraj bhai name ringtone free' and includes the malicious URL. The presence of a link farm and a critical heuristic firing for a malicious redirector strongly suggests an attempt to direct users to harmful content. No scripts were extracted from this sample.

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=suraj+bhai+name+ringtone+free
    • http://digiz.bedminsterpto.org/uploads/1/3/2/6/132682883/18fca1b83a1.pdf
    • http://revusilil.barrowriverartsfestival.com/uploads/1/3/2/6/132681337/441568.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/chappale_kannada_movie_songs_lyrics_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/3355/9203/files/44060209445.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/wood_fired_pizza_oven_plans.pdf
    • https://cdn.shopify.com/s/files/1/0451/9873/7559/files/convert_word_to_programmatically_java.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/13361586853.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7614883084.pdf
    • https://cdn.shopify.com/s/files/1/0437/8345/4882/files/divina_commedia_liber_liber.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/76805623731.pdf
    • https://cdn.shopify.com/s/files/1/0431/4365/9677/files/41092971071.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/ravetipowizanogoguwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/bengali_newspaper_download.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_off00005263.bin
4614a127df3289ee444296bc8e2ec0a691763db727e8dc6b8c9d532876d56f6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5263 5172 bytes
font_01_sfnt_off000063d2.bin
42f87a78abfa5662456449f13b551171ad3a9816f49d315da5eb7df0a059e9cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D2 9768 bytes
font_02_sfnt_off00008544.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8544 4324 bytes