Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56c799b75fbc7c9…

MALICIOUS

PDF

38.7 KB Created: 2020-08-17 03:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f344ddc2803a8a63638c59375f1e6d98 SHA-1: 237d9f00c9f72127416942a35fa423e5874bf584 SHA-256: f56c799b75fbc7c9402ecb92978dd1392c14fca7a2c4bba4323fb1c05ae6c258
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to ttraff.com, which is flagged as malicious. The document body and embedded links suggest an SEO poisoning attempt, using educational keywords to lure victims. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct payload execution.

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=grade+8+fractions+word+problems+with+answers
    • http://files.contrasyncretist.com/uploads/1/3/1/3/131398591/wexare.pdf
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/limajapiwexojikufusuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/25329264936.pdf
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/46308025945.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/bolzano_guida_turistica.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/77389122845.pdf
    • https://cdn.shopify.com/s/files/1/0434/7851/5864/files/hbm_750_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1978/6645/files/14092127812.pdf
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/bigobuwarejido.pdf
    • https://cdn.shopify.com/s/files/1/0432/4022/6984/files/12108061725.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_off00005738.bin
a69d54a7945a4a637fe57d3c7d3e2e589789e134caac308847423d8a99f13991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5738 5852 bytes
font_01_sfnt_off00006b09.bin
f50c48f02b4c9c70342367e32cea39ed9b98736bfce6fd6e9fe211dfc8e333da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B09 10308 bytes

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