Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af03138e23066ba…

MALICIOUS

PDF

55.3 KB Created: 2020-08-18 20:10:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42007fe0c62facae8c3a6f5e250f9880 SHA-1: 612872bfdf480746090066888587eb32158bfa1d SHA-256: 6af03138e23066ba72d87c53cddd3141d97cf39449a75071a2ed743c8cbcca48
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'fishing leveling guide osrs' and a URL that appears to be part of a link farm. This suggests the PDF is designed to drive traffic to malicious sites under the guise of providing information.

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=fishing+leveling+guide+osrs
    • http://files.kellydaydreamer.com/uploads/1/3/1/8/131871453/jaligitoduruxig.pdf
    • http://vabol.fieldofdreamsnh.org/uploads/1/3/0/9/130969204/vojokozob.pdf
    • http://files.authenticseeds.org/uploads/1/3/0/7/130775304/d52c4fd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1746/9080/files/lotaxal.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0427/files/baixar_creator_adobe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3614/6855/files/pifofaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/71828063742.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/bukutozuxenumudav.pdf
    • https://cdn.shopify.com/s/files/1/0435/6122/2307/files/how_to_use_content_patcher_stardew_valley.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/romubesunip.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/87686273694.pdf
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/25434431546.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/seven_characteristics_of_organizational_culture.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/migixiwozas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009343.bin
4f4a7ff3896f52b7f1f5ba5d8253deec60c740f69382f64f601a7a4068047e41
pdf-font-stream PDF embedded font (sfnt) at offset 0x9343 4892 bytes
font_01_sfnt_off0000a3e2.bin
1651e530571218e2e3f56747e422ead31add13a3b895599ad6cbf5d08750d29a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E2 14120 bytes