Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18fcc14abc192f0…

MALICIOUS

PDF

42.6 KB Created: 2020-08-29 11:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c582edee0317dbf64b922a4df9cb88d9 SHA-1: ee5adf2e940e3e52ff6da93b7d01156f2ababb82 SHA-256: f18fcc14abc192f0fc8cc818009a8e55e2652eac8cd212ab3731a22ddc5aae80
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with keywords related to a song download. The document body and embedded links suggest a lure to a link farm, likely for SEO poisoning or to redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=namo+namo+narayana+song+free+downloa
    • https://static.usrfiles.com/ugd/b8c837_e7d1ee1b78a9442ca693c84e1bd26f27.pdf
    • https://static.usrfiles.com/ugd/7598fa_cff771cffe84489297973eabe81c464e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6a87fb6912d40de9e8e8e6d477cc261.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa2cf6b96ada42b1abdcefda0868898e.pdf
    • https://cdn.shopify.com/s/files/1/0437/7778/6018/files/cartoon_video_chhota_bheem_cartoon_video.pdf
    • https://cdn.shopify.com/s/files/1/0429/8201/5135/files/39378143474.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/peter_atkins.pdf
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/used_car_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0437/1457/6538/files/nonutupodiwovisulila.pdf
    • https://cdn.shopify.com/s/files/1/0434/0154/3830/files/holy_bible_catholic_download.pdf
    • https://cdn.shopify.com/s/files/1/0462/5622/6458/files/brand_guidelines_synonym.pdf
    • https://cdn.shopify.com/s/files/1/0440/6870/0325/files/carrum_downs_secondary_college_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/adjectives_and_their_opposites.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/20558634471.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f4c05d4cd9f4809ad1a8fb468ce694b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e62cfd464b1a416fb85931d185a71ad7.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_off00005a30.bin
ecbba9a04ad31cf335077af02c747da2fe721e5b41b9bf7e06f85d70552f3f24
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A30 5392 bytes
font_01_sfnt_off00006c86.bin
67861f5d46bc7df138069f21c105f84b66bf8e8fc2e4381dcecf92c6c70e5b89
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C86 14840 bytes