Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d4048ae45d2414…

MALICIOUS

PDF

32.3 KB Created: 2020-07-31 16:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed31fb3d36073ccd8a6f1c0a706b81c2 SHA-1: 37f0ea8f8b327833d590bb3694f9262b485e4ad1 SHA-256: f4d4048ae45d24147b69c49dbcb600c8bb2902cfdc65fa6cc5a3c18988fb1e8b
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a large number of embedded links, many pointing to external PDF files, a technique often used for SEO manipulation or to host malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.com. The document body contains garbled text but includes the phrase '1970c10 for sale', suggesting a potential lure.

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=1970c10+for+sale
    • http://files.gigi.london/uploads/1/3/0/7/130740524/dolixopazegad.pdf
    • http://files.botanicalchildren.com/uploads/1/3/0/7/130738971/f8e8d01cad4f.pdf
    • http://files.aerialmediavisions.com/uploads/1/3/1/0/131070476/xelalopixorugawi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4565/6488/files/ribixaxuvoroxedutoso.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/mutugemef.pdf
    • https://cdn.shopify.com/s/files/1/0438/5924/7264/files/xuzaduvini.pdf
    • https://cdn.shopify.com/s/files/1/0431/5974/8769/files/gofaterexexiwid.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/kamufebero.pdf
    • https://cdn.shopify.com/s/files/1/0437/0612/2393/files/nuxis.pdf
    • https://cdn.shopify.com/s/files/1/0428/7397/9043/files/83714567623.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/tatakepumame.pdf
    • https://cdn.shopify.com/s/files/1/0435/3481/1290/files/vakalujatomuluwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2733/files/wogojotofijebij.pdf
    • https://cdn.shopify.com/s/files/1/0439/2416/0667/files/pofumusasefuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/mupedunewukuwebidubopu.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_off0000432f.bin
f334e0eb58d0d1f8162a8011572617a99ef99db86f152a5db7699533ae633355
pdf-font-stream PDF embedded font (sfnt) at offset 0x432F 5208 bytes
font_01_sfnt_off000054fa.bin
2249f455a3f5d6d5384acdc36958b362a625012c6aef8bf04967e0b4ef20ce42
pdf-font-stream PDF embedded font (sfnt) at offset 0x54FA 9312 bytes