Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff99fe302d78e5f…

MALICIOUS

PDF

46.3 KB Created: 2020-08-23 19:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e62b4867f77f5b266475a49f6b55b964 SHA-1: ae268b9f11a1b2504ce3e4012b2a5ae78ce430a2 SHA-256: dff99fe302d78e5f8d194631928b4a75fbd09db303af3c5d896e8bbcf3b805d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though partially corrupted, includes the malicious URL and appears to be a lure for a 'Sims 4 doctor career sickness guide'. No scripts were extracted, but the presence of malicious links strongly suggests a phishing or malware distribution attempt.

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=sims+4+doctor+career+sickness+guide
    • http://files.jordandeadseaminerals.com/uploads/1/3/0/8/130814631/fa0c2b1c1b12.pdf
    • http://files.allaboutherexpos.com/uploads/1/3/0/7/130775368/sexulepisazusinavem.pdf
    • http://files.gooselaneeggfarm.com/uploads/1/3/1/0/131071057/698685.pdf
    • http://files.siriolsherlock.com/uploads/1/3/0/9/130968972/tobelawufela.pdf
    • https://cdn.shopify.com/s/files/1/0435/6246/7489/files/ssc_marksheet_2019_comilla_board.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/50758294110.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/rasizimizekemawixeronavow.pdf
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/fujogozukodi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3278/6597/files/tixagujivugobafuriwelat.pdf
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/usps_movers_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/11582386804.pdf
    • https://cdn.shopify.com/s/files/1/0435/8933/7256/files/sample_data_analysis_in_qualitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/pdf_agama_islam_kelas_xii_kurikulum_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/0981/0327/files/altivar_31_inverter_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/33739241167.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_off00007648.bin
a238424f8e60b50d1ac03f954a92dc6006fd62c1a38bf1c57dba7db36228bca6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7648 5480 bytes
font_01_sfnt_off000088d3.bin
175a6eefce3a76bc492190387c9ecb42c5dfaa6d56234b39d2b58f2e383fc234
pdf-font-stream PDF embedded font (sfnt) at offset 0x88D3 10272 bytes