Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d402a223e32178…

MALICIOUS

PDF

45.5 KB Created: 2020-08-14 04:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 192b716f901eaee0992aa6162a08d6a8 SHA-1: 56453d5599c03dc96bea6b9f99a754275f01d8f4 SHA-256: 88d402a223e321789525299c377e25286fca5da8936d56187b656d4a2f6df181
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to a known malicious redirector at 'https://ttraff.cc/pify?keyword=android+phone+under+7000+tk'. The document body, though malformed, contains text related to an 'Android phone under 7000 tk' lure, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized PDF links points to a link farm strategy to distribute malicious content.

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=android+phone+under+7000+tk
    • http://files.yingyanzhao.com/uploads/1/3/1/4/131453902/vitesiga.pdf
    • http://gedexob.hannahbeerfas.com/uploads/1/3/1/4/131406390/fcf74.pdf
    • http://files.jholmark.com/uploads/1/3/1/6/131606092/1837923.pdf
    • http://files.revolutionsbselect.org/uploads/1/3/1/3/131383493/pewamaxaziga.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1129/files/tewagojok.pdf
    • https://cdn.shopify.com/s/files/1/0434/7327/2992/files/kabazopukimepekijuxel.pdf
    • https://cdn.shopify.com/s/files/1/0429/4321/7830/files/65475240523.pdf
    • https://cdn.shopify.com/s/files/1/0433/6399/1717/files/schneider_altivar_630_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6004/3682/files/zapakalet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2898/7547/files/64299052585.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3559/files/evinrude_trolling_motor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/fofipuvetulixodu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/pofuvawex.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/descargar_bestiario_mitologico.pdf
    • https://cdn.shopify.com/s/files/1/0429/1103/9655/files/wezurub.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/word_limit_for_common_app_essay.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/california_dreamin_piano_sheet_music.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_off0000741e.bin
3c5721af6b6ef07519b25a422b93d3922869a51a1dcbfd54e9d09bb73b5a9414		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741E 4900 bytes
font_01_sfnt_off000084ca.bin
24fbd2dc9e4549c16412a5093b18042dbfe70148fb75e28dd45bb0866cc77c3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84CA 10616 bytes

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