Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f6f0366c440544…

MALICIOUS

PDF

42.7 KB Created: 2020-08-25 12:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c652fbffac8582e970e71493be75bf96 SHA-1: 9bea0e79ad9ab9716e519b5ddd35d703f8255d95 SHA-256: 70f6f0366c4405443fc8be343f65c799ca561ef661ef2aabf629ffc2943fda6d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that appears to be the same redirector. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

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=first+day+of+kindergarten+sheet
    • http://files.nonstopinterior.com/uploads/1/3/1/4/131453592/konatasuso-vipaze.pdf
    • http://files.scottiesrockfoundation.org/uploads/1/3/2/8/132816036/ganolotimexux.pdf
    • http://files.wagssports.com/uploads/1/3/1/8/131856173/dd5a0d33ce.pdf
    • http://files.highlightminiatures.com/uploads/1/3/0/8/130874121/1259835.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/7818/8198/files/situdosudofodiwaxili.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/movies_sites_in_hd_free_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3536/1442/files/sawagamotunabuzagisexi.pdf
    • https://cdn.shopify.com/s/files/1/0447/6724/8535/files/vehicle_aerodynamics_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/0252/5856/files/adaptive_control_astrom_wittenmark.pdf
    • https://cdn.shopify.com/s/files/1/0436/1987/7024/files/14443493897.pdf
    • https://cdn.shopify.com/s/files/1/0428/5700/5222/files/fofibezavewulufisan.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/29886048536.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5594/files/hemifacial_spasm_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/gafuto.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c65.bin
1e7df9b28864d9531ee7f88f6179a32ef0e5f768e54b0f85d380f05d4613f3f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C65 5044 bytes
font_01_sfnt_off00006d8f.bin
509f87a103398d006116ae0a948475e46557f1b56ec585b544b4df48f63e70ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8F 10024 bytes
font_02_sfnt_off00008fe6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE6 4324 bytes

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