Malicious PDF — malware analysis report

Static analysis result for SHA-256 19456a6f431e9b9a…

MALICIOUS

PDF

74.5 KB Created: 2020-08-12 16:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90ae1ec085373051d6dd0ccb54415f7c SHA-1: 5c68c7661f9ce68ed93551651df4ad82f37abf31 SHA-256: 19456a6f431e9b9aff59bf01a712dac69dbbe1a905f4c72a13588ead6ff3dbcc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'affairs cloud july 2020 weekly pdf', aligning with the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. The presence of a mass external PDF link farm further indicates malicious intent, likely to distribute further malicious content or engage in SEO manipulation for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=affairs+cloud+july+2020+weekly+pdf
    • http://files.sparklyshop.co.uk/uploads/1/3/1/4/131455398/zopopurin.pdf
    • http://files.create-and-decorate.com/uploads/1/3/1/4/131407918/8866996.pdf
    • http://files.klayworks.com/uploads/1/3/0/7/130776726/vutisiwaxo.pdf
    • http://files.americancanyonchiropractic.com/uploads/1/3/0/7/130775830/e339b500.pdf
    • http://files.musiclink808.com/uploads/1/3/0/8/130815026/967ceb768e2e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/satezeperepuziz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/logukizavoxezebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2063/9646/files/rogimenem.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/gevanuraxilusexupedoniluw.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/90627999462.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/81939582606.pdf
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/mekezir.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1731/files/90971757336.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/pivamebodurewofamozax.pdf
    • https://cdn.shopify.com/s/files/1/0433/9348/2902/files/architecting_microsoft_azure_solutions_exam_guide_70_535.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9397/files/astrology_for_dummies_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/blank_calendar_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/gubedirezexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4158/files/bijafanab.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_off0000e433.bin
19d9b16bf999a7199d29b83299392c20ae717c3b5e8765e3398ac82483d216c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE433 5748 bytes
font_01_sfnt_off0000f7ea.bin
53cfd50a0a158d9d4961fc0e6d2e3e6aa44eca6a2f2f646d9d7e198eb6a037ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EA 10604 bytes

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