Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88868be11ca7acb…

MALICIOUS

PDF

50.5 KB Created: 2020-07-25 00:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d65711d953b24ee85faa3f7e038872d SHA-1: 7710fda7e83ea1b90cf4f3602ffc9e2049f0efce SHA-256: b88868be11ca7acbfbcb01fbaa713424ff232f0c06b2fba20e88f85b1d4127f3
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. Another critical heuristic identified a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content across multiple sites. The document body, though heavily obfuscated, appears to contain keywords related to online gaming guides, likely serving as a 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=goldsmith+leveling+guide+ffxi
    • http://files.maxwellheightstech.com/uploads/1/3/1/3/131398452/eba010e4.pdf
    • http://files.atouchofcolorbytamilee.com/uploads/1/3/2/7/132740408/78880.pdf
    • http://files.wanderwellfitness.com/uploads/1/3/1/4/131482931/lonizegapitevetas.pdf
    • http://files.wanderwellfitness.com/uploads/1
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/gamupasuxaxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/37530911026.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0794/files/75925003136.pdf
    • https://cdn.shopify.com/s/files/1/0432/6090/3582/files/dapowagozurexovugot.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/93716481565.pdf
    • https://cdn.shopify.com/s/files/1/0431/8062/1984/files/vikekowejoduwotarutar.pdf
    • https://cdn.shopify.com/s/files/1/0430/9902/9655/files/78571865618.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/zemorarijole.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/ruzalin.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/89662108804.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_off000082ad.bin
38f726bd354f20b6b40efd3e4d522ea779a6d58e32fad4fd8f61af8e292c3541
pdf-font-stream PDF embedded font (sfnt) at offset 0x82AD 5056 bytes
font_01_sfnt_off000093db.bin
017a8cd98120f87d66b2d29d0bdf4527973a5668148407d7a93a2135cf554114
pdf-font-stream PDF embedded font (sfnt) at offset 0x93DB 12632 bytes