Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd9e3812d3449c2…

MALICIOUS

PDF

45.6 KB Created: 2020-08-05 08:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4c4ff57adc6d2366355f7765ba774fb SHA-1: 5feef3b844306fa7359d6dcd85691978d7119709 SHA-256: 6dd9e3812d3449c260a36a7334620c44d9ea29ce68dcda3288ba0bbca9a693a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. This suggests the document is designed to direct users to malicious websites, likely for phishing or malware distribution.

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.ru/pify?keyword=protocols+in+computer+networks+pdf
    • http://files.oxnard-photography.com/uploads/1/3/0/9/130969352/gedot_viwifiparag_dosazik.pdf
    • http://files.peterhendricksonarchitect.com/uploads/1/3/1/6/131606248/sonorowisimelo.pdf
    • http://files.ronsokolbooks.com/uploads/1/3/0/9/130969364/c302a8c1736f.pdf
    • http://sebaf.commercialbondstexas.com/uploads/1/3/1/8/131871462/rojegekepaxigutuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22700630349.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/xisokuzilafetijesenupu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/diwutaxil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetuvoveluganimuwejipas.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/16914560559.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/zevivigojafedanowipufe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1105/files/26423906739.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/hallelujah_piano_sheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63908687591.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/65483693669.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_off0000673e.bin
d69079e2652bf35808b0ffa47a1f09663fa00f6d502543b3634c91a1468f786c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673E 5128 bytes
font_01_sfnt_off000078a2.bin
f924eef56f36ef07271a27d2c6ff1c264f6f17c4773996009b756208e7a72c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A2 10128 bytes
font_02_sfnt_off00009b57.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B57 4324 bytes

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