Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9763a04afc82a95…

MALICIOUS

PDF

45.1 KB Created: 2020-08-12 13:38:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e67fdd6b4d2bc1b9f319461312c81521 SHA-1: 991550a055216cc999610a7695b099bfbf0742b1 SHA-256: a9763a04afc82a95d175fc516c209db3fa9d9732da5433850de20077aca92448
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a URL leading to ttraff.cc, a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Peningkatan kualitas sumber daya manusia pdf' and references wkhtmltopdf, suggesting a lure document. The presence of numerous Shopify-hosted PDF links, while some are benign, contributes to the overall link farm characteristic identified by PDF_SEO_LINK_FARM.

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=peningkatan+kualitas+sumber+daya+manusia+pdf
    • http://files.anniesshineandsparkle.com/uploads/1/3/1/8/131856827/nalofa-lejubewedofo-ratevi.pdf
    • http://files.discerngod.com/uploads/1/3/2/7/132740480/nogegal-mexemis.pdf
    • http://rugit.smykkemageren.com/uploads/1/3/2/3/132302942/164d59e538.pdf
    • http://tomebejiz.jbcoachescorner.com/uploads/1/3/1/1/131163635/towowujuzuk_bapesubafagufo.pdf
    • http://files.hbscooters.com/uploads/1/3/2/8/132814305/tizubejowa_vadufebixoxajod_dukikexebibumen_nofamem.pdf
    • https://cdn.shopify.com/s/files/1/0451/1285/2632/files/psicologia_autoconhecimento.pdf
    • https://cdn.shopify.com/s/files/1/0435/8658/4733/files/63376772506.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wajafaliwufenosikem.pdf
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/libutaragerawuligupama.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/muxijomoxaguxoros.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/fitileje.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/letter_c_activities.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/liwukepurenugiweda.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/52618795311.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/59276049452.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/wozivirapesorumewosamab.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/helping_verb_worksheets_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/levedokam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vidabuvuwegorowomilamum.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/ammonium_dihydrogen_phosphate_msds.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/
    • https://cdn.shopify.com/s/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071e4.bin
dc15eca7c83a3768934ef68a774ce6ccc123b520000c0a2ec82bd0cbfc352069		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E4 5668 bytes
font_01_sfnt_off00008515.bin
3ae5696ccbd9239c25ddf95beb349380964aeec82d5ebec92c95d5b1719682d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8515 9936 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.