Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bd1548f8dec2fe…

MALICIOUS

PDF

44.9 KB Created: 2020-08-12 03:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ab43fc3096f98f3cd9de4e8fa819fc7 SHA-1: b1786b05371dfe1e3c634caeaf7912cb0d77f29d SHA-256: 78bd1548f8dec2fe2c201f71ee5d759fa2c2a8da4bd5c99abd14b2e37a1b3243
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a redirector URL associated with malicious activity. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to defraud the user, likely by directing them to a phishing or scam website. The presence of embedded URLs and the nature of the heuristics indicate a social engineering attack aimed at tricking the user into clicking malicious links.

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/wb?keyword=a%20piece%20of%20my%20heart%20play%20script%20pdf
    • http://files.jamideabakery.com/uploads/1/3/1/6/131637190/bitirin.pdf
    • http://xuxibaso.ncautotransport.com/uploads/1/3/2/3/132302815/3374275.pdf
    • http://natite.cottagerowgallerydc.com/uploads/1/3/1/3/131383744/gebajel-kirapizijikesor-pofokuxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/cash_flow_statement_problems_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/25403461750.pdf
    • https://cdn.shopify.com/s/files/1/0430/9476/9821/files/j_aurais_prfr_vivre.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/mekanisme_kerja_obat_atropin_sulfat.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/66644046779.pdf
    • https://cdn.shopify.com/s/files/1/0433/2781/5833/files/bhaktamar_stotra_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/pesalarivonifefowuze.pdf
    • https://cdn.shopify.com/s/files/1/0429/4092/4063/files/pj_sparkles_doll.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/mekudelo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/17165440704.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_off000071f2.bin
29639a6e110c2cd6e1edd34bd4dca207ab4e498ccb7fae314a5754510022967c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F2 5484 bytes
font_01_sfnt_off00008475.bin
2810b65086e7f4f2a0d54972344ffda3804fb5ffbc965a970e772c98a80e3831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8475 10008 bytes

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