Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7daf8a2a7ca004…

MALICIOUS

PDF

54.4 KB Created: 2020-08-05 15:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b2d2976643a72b1bc5c88c61a3a16c2 SHA-1: 410e9db3da15127b71f5ffa678e6d7b9e459d308 SHA-256: 6d7daf8a2a7ca00418dbae67e58a8f952eea3f3e4acfa924fa2670672f962c32
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with a critical heuristic identifying it as a malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=broadcast+news+script+pdf', is embedded within the document body, suggesting an attempt to direct users to potentially harmful content. 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.com/pify?keyword=broadcast+news+script+pdf
    • http://files.ishairimmer.com/uploads/1/3/0/7/130776567/guruladilorizopese.pdf
    • http://files.cinnamombakery.com/uploads/1/3/0/7/130740521/wuwidegulagupuwuko.pdf
    • http://files.bensvintagevillage.com/uploads/1/3/1/8/131856158/gamonurimiserez.pdf
    • http://files.alternativefruit.com/uploads/1/3/2/6/132682701/gananebive_wujajuromitazan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/vojono.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3077/files/protein_electrophoresis_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/wolosupadupedozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/wuluzaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/bidaramud.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/bankers_adda_capsule_download.pdf
    • https://cdn.shopify.com/s/files/1/0448/0725/8269/files/stihl_blower_bg55.pdf
    • https://cdn.shopify.com/s/files/1/0439/2786/3464/files/naruto_clash_of_ninja_4.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/88054929949.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/samodunamibudaxutu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6200/files/46313195883.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000974e.bin
f2e77550f0c2310c5140ab58674f01b96e1975a0d5dde8078f5954e7a21436db
pdf-font-stream PDF embedded font (sfnt) at offset 0x974E 5260 bytes
font_01_sfnt_off0000a955.bin
bd1bb39c80f42ae187d2f50e0ad7582c00e35c4f7233e7ddfb880b307d92fc2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA955 10356 bytes