Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa68bced2854b8f…

MALICIOUS

PDF

68.2 KB Created: 2020-08-14 01:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53306b94fd6f1f7aff74b116f0035a6d SHA-1: 36a9f7b28079a6ac332ce727365ef9fa3a1307c2 SHA-256: 6fa68bced2854b8fa6678ac629e9dd121f2e42d240e34e6c6fc0e2bc150bf9bf
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a reference to the malicious URL. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content.

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.cc/pify?keyword=security+master+plan+template
    • http://files.anzonaconference.net/uploads/1/3/1/3/131379699/4645048.pdf
    • http://pafuwage.delanychiropracticcenter.com/uploads/1/3/1/3/131398140/e3bafdc53a.pdf
    • http://files.girlzonedge.com/uploads/1/3/1/8/131871994/9512342.pdf
    • http://files.timbercreekfieldspaniels.com/uploads/1/3/0/8/130873877/52a3eae0cf059.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/weroxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4419/9829/files/c_programming_multiple_choice_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/tuputew.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/upsc_mains_answer_sheet_of_toppers_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/pdf_reader_and_annotator_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/wijusutajitosivutuzamuse.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/crioterapia_facial.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/53823718969.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/soluwelexilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/xetatugufomasinoga.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/distributed_algorithms_an_intuitive_approach.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/komevifizemedolerizasudi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/39025673194.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/45942550581.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_off0000c133.bin
0826fccd9afdf69bdca0e164b32caf9223aa9f32c7875a2d19f23ac421dcc82a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC133 5056 bytes
font_01_sfnt_off0000d245.bin
8c190005de967fa230c7ca13b6d66a24d3d3e3cb003811bd451e59a29303ee15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD245 10204 bytes
font_02_sfnt_off0000f528.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF528 4324 bytes

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