Malicious PDF — malware analysis report

Static analysis result for SHA-256 f700e4f6330df244…

MALICIOUS

PDF

46.9 KB Created: 2020-08-17 11:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc1ed6a6bde8c22e69f0b4557ab0f9de SHA-1: b34e81e3e3c21daeb669f5e9e7e4c5a97989d5d3 SHA-256: f700e4f6330df24419b476b5cd353cdf0151abb88dc4363f9b50964b54f2eb84
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, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a game download. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning to increase the visibility of the malicious content.

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.ru/pify?keyword=boxhead+zombie+wars+on+android
    • http://files.bellemeademiami.com/uploads/1/3/1/1/131163969/2072253.pdf
    • http://files.smlministries.net/uploads/1/3/1/4/131453982/6aa2d4.pdf
    • http://files.traceandcompany.com/uploads/1/3/0/7/130739309/4132629.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8440/files/82431018818.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/faxusimefefaruzoloreg.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/26111668896.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/noriseworokuzaboguwuwut.pdf
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/38639518334.pdf
    • https://cdn.shopify.com/s/files/1/0440/1358/4542/files/30514939292.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/92195880918.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/sabawer.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/pugunopur.pdf
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/tutewitinoxer.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_off00006aae.bin
0a4d8b58f08827c33d2470c21bf45311941d2952c54945434c922f3a57bec692
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAE 5140 bytes
font_01_sfnt_off00007c0d.bin
4e7ae1082698e652f317d63c3ba191ba149a2b4f1a500ef5f003c6de6dd72b24
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0D 10792 bytes
font_02_sfnt_off0000a0d8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D8 4324 bytes