Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27fb7ff2248bd7d…

MALICIOUS

PDF

49.8 KB Created: 2020-07-30 11:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c58cb276313ab14248c10768653777ad SHA-1: 0a4cee6c55f4c8182a94d3ebca8c74cc38a86c78 SHA-256: e27fb7ff2248bd7df242f50206617940297ad993ca5343a2ca270226b1b1d1df
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is ttraff.cc, which is known for redirecting to potentially harmful content. The document body appears to be obfuscated or corrupted, but the presence of numerous external links, many hosted on Shopify, suggests an attempt to distribute or host malicious content indirectly. The ML classifier also strongly indicated maliciousness.

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=physics+textbook+for+high+school+pdf
    • http://files.fincascoffee.com/uploads/1/3/0/7/130740573/jinuma.pdf
    • http://files.ramlcpa.com/uploads/1/3/1/6/131607075/palaza.pdf
    • http://files.youandmesparkle.com/uploads/1/3/2/6/132695302/petogubivu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/56265787013.pdf
    • https://cdn.shopify.com/s/files/1/0436/9747/1656/files/1119964722.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/rolatameganisadip.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/pijubosena.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/pamekoguwuxupidufaji.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/foxetokedojem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/javisa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/32617936179.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/dojov.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/34545848700.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/tumozijizobunadimuborara.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2056/files/jevazoxupibodezas.pdf
    • https://cdn.shopify.com/s/files/1/0429/4311/9516/files/nazuvusawiguxoboxoniw.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/
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/pijubosena.p

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081b2.bin
a9db505dfef8a3594ec19d155af157eeeffcb259591282a5a11b3106567af663		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B2 5264 bytes
font_01_sfnt_off000093a8.bin
dffd2235afec5891c4f14ed1c50edc526ed7216a9aafc1b33cbb227bf8262781		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93A8 11928 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.