Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95c1e6838943e22…

MALICIOUS

PDF

40.6 KB Created: 2020-08-16 17:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32dcbd5acec0ac5a39021d95c1a6054b SHA-1: 35525c623a267900173d190ca2b1346eebcece7a SHA-256: e95c1e6838943e22b8ea373c77b8b4c6be11f3fe50288455d3f39db10de7ff47
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high density of embedded URLs, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.cc/pify?keyword=game+chat+cross+platform+rocket+league, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. 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.cc/pify?keyword=game+chat+cross+platform+rocket+league
    • http://files.skylinescotties.com/uploads/1/3/1/3/131398144/1286120.pdf
    • http://files.aaronjwhitfield.com/uploads/1/3/0/7/130775515/136d270a6848.pdf
    • http://files.intagtech.com/uploads/1/3/1/1/131164176/vumira-nepeniwo-bepirulopip-gonefop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/5380553430.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/64295505748.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/coordinate_geometry_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6459/7397/files/skyrim_se_cbpc.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/27896180584.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/adblock_android_root_xda.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/peguxatetekepeviwavejejen.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/pdf__speak_now_1.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.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_off00005fef.bin
c063882d1ec31ccdcd206e428bb22c83fc34b716683c19f0cc2f772b39787331
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEF 5524 bytes
font_01_sfnt_off000072a3.bin
a552d8e7c67a4cb5c6c8d079a6dd2f87e8923d7ef9e30e4adc117f4b150d79e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x72A3 10128 bytes