Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ad83aaf8353f52…

MALICIOUS

PDF

81.7 KB Created: 2020-07-27 12:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7ce1af6e154e46e061a4c99bf80e8dd SHA-1: 39d0522fb75f05665edadf89205d5a8540c2123b SHA-256: 99ad83aaf8353f524901a1b0c591c1f7a19e7547e403af34cfd09236b0f0be20
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a live stream for a sports event. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this, pointing to ttraff.com. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on cdn.shopify.com, suggesting a link farm used for SEO poisoning or distributing further malicious content. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the document.

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=barcelona+vs+liverpool+live+stream+bleacher+report
    • http://files.cultivatecornwall.com/uploads/1/3/2/7/132741189/374216.pdf
    • http://files.ijwiryabategereje.com/uploads/1/3/1/3/131380627/metagol_wubozutatavad.pdf
    • http://files.livingbalancedesigns.com.au/uploads/1/3/0/8/130874358/7366960.pdf
    • http://files.dakotalandtrust.org/uploads/1/3/1/3/131398598/rerewajolizaviv.pdf
    • http://files.dakotalandtrust.o
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/varadewudafomedusari.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/2842673450.pdf
    • https://cdn.shopify.com/s/files/1/0438/2559/4530/files/18473929450.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0151/files/xubox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/24375498268.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/zokamexitapipo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/bulonunazuxeros.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1642/files/84403836992.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nemubowakupupoda.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/69262950678.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b091.bin
b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB091 6588 bytes
font_01_sfnt_off0000c10b.bin
3d4cb3730232f4323dd6e69779cf5fd9183a931ebae375421894ad555a2e744b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC10B 5212 bytes
font_02_sfnt_off0000d280.bin
dedabcddd58b442e5a5bb2220c1078bdce2ea901c9fae70a4d04a2961e758986		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD280 10984 bytes
font_03_sfnt_off0000f6f9.bin
ab3203521324a8c577d7fb4a6ddf2cafaa77da70e8bff87572f9c69df6a31202		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 10924 bytes
font_04_sfnt_off00011c95.bin
7878326d9a859954162ee8a6fdbc8cee4ee77d4bf761840254828563795a7914		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C95 18120 bytes

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