Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae5ad9b9bc895bb…

MALICIOUS

PDF

35.5 KB Created: 2020-08-17 12:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f726e1bc00a1a2cb62b110366db7c7bf SHA-1: d175009f8c2a1ba0e18709f0f4e95b0c35556907 SHA-256: eae5ad9b9bc895bb247e5d9eb9a35fde0d8e92085a1c6068415e6b46696e9f04
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm. One of these links, https://ttraff.cc/pify?keyword=ringtone+chicken+dance+warkop, is identified as a malicious redirector. This suggests the document's primary purpose is to lure users into clicking malicious links that lead to further compromise. 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=ringtone+chicken+dance+warkop
    • http://files.staragricultureproducts.com/uploads/1/3/2/7/132740338/3741638.pdf
    • http://memasu.mariadeliagarcia.com/uploads/1/3/2/6/132681231/daboxadezo-fasebiwojofuwi-jogilanaka-fixeraron.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/mibofudobeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1362/files/dusafev.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3880/files/discord_webhook_github.pdf
    • https://cdn.shopify.com/s/files/1/0440/5982/0182/files/vetelosawawodis.pdf
    • https://cdn.shopify.com/s/files/1/0452/4526/8128/files/1258733399.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/large_to_small_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0438/7222/3387/files/kikoxigajolijegadagapez.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6341/files/gapapufixetadojimosuvusi.pdf
    • https://cdn.shopify.com/s/files/1/0447/9103/8118/files/53890295206.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/christina_aguilera_beautiful_sheet_music.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_off00004154.bin
9706192f6aad45dd8493fe83fec02906fb1d1f2807749cc4b547ca361aa7ff24
pdf-font-stream PDF embedded font (sfnt) at offset 0x4154 5076 bytes
font_01_sfnt_off0000529b.bin
caf0551859080392cf6d56a4665076a325f7bf6964ab99a1639c45c2b3776ef6
pdf-font-stream PDF embedded font (sfnt) at offset 0x529B 9512 bytes
font_02_sfnt_off00007349.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7349 4324 bytes