Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d83c69db1009868…

MALICIOUS

PDF

45.5 KB Created: 2020-09-01 19:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ea1351934021f12df8da4e15b3e0ec5 SHA-1: 9012c6ad26fe4077a81c6d714b4bd3b10f9aeb90 SHA-256: 5d83c69db10098689c95e7cb25fcdcb44fbf97f1fd077f46b7400fae2e50a422
194 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating it is an advance-fee scam lure, presenting language related to beneficiaries, prizes, and courier delivery. It also contains a critical heuristic firing for a malicious redirector link, which points to `https://ttraff.me/wix?keyword=key+informant+interview+analysis`. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect the user to malicious infrastructure.

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.me/wix?keyword=key+informant+interview+analysis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0465/0598/4158/files/bogaduziwogunomudop.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/common_features_of_bantu_languages.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/85150339678.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/english_root_words_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6960/files/53910550822.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/49190246717.pdf
    • https://static.usrfiles.com/ugd/9904c2_38bc20f4fa0645d19862490cca07ce17.pdf
    • https://static.usrfiles.com/ugd/b914b5_5fb7e178e089400680c011fb5f219a32.pdf
    • https://static.usrfiles.com/ugd/ade4e6_64e49096bd164d2db2b580d8495ff3f4.pdf
    • https://static.usrfiles.com/ugd/98857b_45cc6d52cdd347ba865da7b0ffc1e71f.pdf
    • https://static.usrfiles.com/ugd/516793_7c4dedfd9b404e3ea3e1d09c9d672236.pdf
    • https://static.usrfiles.com/ugd/834936_e389d45275c04277aae3bbfb9c44892a.pdf
    • https://static.usrfiles.com/ugd/22bf55_21e87f46a33c4348957bd333031caf62.pdf
    • https://static.usrfiles.com/ugd/6c032c_bf05ca6716034b7b9e91692042f5a332.pdf
    • https://static.usrfiles.com/ugd/516793_857dc83d0d384181bc308fa92b222657.pdf
    • https://static.usrfiles.com/ugd/ab059d_6b34fef9a6564a178d1183cbcaff13bd.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_off0000737d.bin
4dbf2a8b87a48c04ec0acf4e7ec982dce82480e90547b2c6ba1cb3e8ba401607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737D 5136 bytes
font_01_sfnt_off00008502.bin
ce2db4393cecf14b22a799a6bb4bd7b779ebd2e60929fd4cc4f77e4bf0c77c32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8502 10452 bytes

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