Malicious PDF — malware analysis report

Static analysis result for SHA-256 369fc88df7b6eaf7…

MALICIOUS

PDF

50.3 KB Created: 2020-07-28 16:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dc58c33961904ff8cea79766cc7b307 SHA-1: a19b302e5637d3741245c99fa35c3d98ea7c08af SHA-256: 369fc88df7b6eaf7a14d95180969163270279a4f25226d64103ce42984b84cc9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The ML classifier also strongly indicated maliciousness. The presence of a large number of external links suggests an attempt to distribute malicious content or manipulate search engine results.

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=reporter+definition+root
    • http://files.proreefcorals.com/uploads/1/3/2/6/132680860/kuxixutovadigazazade.pdf
    • http://files.rebeccacordell.com/uploads/1/3/1/3/131380341/44484.pdf
    • http://files.saltandumber.com/uploads/1/3/1/3/131383821/nadenupenasitu_peleme_wawejatururase.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/17982138375.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/molapefuxozuno.pdf
    • https://cdn.shopify.com/s/files/1/0428/4035/9068/files/zefal.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/50460284311.pdf
    • https://cdn.shopify.com/s/files/1/0435/7462/4419/files/pepediluwevuritugilexu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/91179350983.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2315/files/kaxibomopuxevatip.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2680/files/nolimaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/38034011018.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/kisefone.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/
    • https://cdn.shopify.com/s/files/1/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e83.bin
d6bcd7172c967072071ff06fe453de88437d6d0db75033bfeeb64dbb6e8c3bb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E83 4412 bytes
font_01_sfnt_off00007d8f.bin
2f4eb6bdc2775c2d520b5bec316af12c69e0bf9f4768ee6a0688abeff3910bf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8F 12768 bytes
font_02_sfnt_off0000a757.bin
73f6f760a67782f27700c3ed047511a210a1e3765a9cc4fd416c63ff6a2522af
pdf-font-stream PDF embedded font (sfnt) at offset 0xA757 16060 bytes