Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da327d2484d4677…

MALICIOUS

PDF

71.9 KB Created: 2020-09-20 03:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35e8338a543cfd29699b1c282ce93ace SHA-1: 195c759906fbaedfacddd4594125f6e50bd03dd6 SHA-256: 9da327d2484d467753e1dff14799ca2b1ac31b1d2be39cb1b1e9f8d9dfee688f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.club/wix?keyword=c%25C3%25A1ch+l%25E1%25BA%25A7n+h%25E1%25BA%25A1t+m%25C3%25A2n+c%25C3%25B4i+m%25C3%25B9a+chay`. Another heuristic indicated a PDF link farm with 30 external links, many hosted on `cdn.shopify.com`. The document body appears to be heavily obfuscated or corrupted, but contains the same malicious redirector URL and several benign-looking Shopify URLs.

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.club/wix?keyword=c%25C3%25A1ch+l%25E1%25BA%25A7n+h%25E1%25BA%25A1t+m%25C3%25A2n+c%25C3%25B4i+m%25C3%25B9a+chay
    • http://dilex.johnguillory.com/uploads/1/3/0/7/130775048/xixodepilelok-jitomox-rupopigobowoxoj.pdf
    • http://files.bellyacresrvpark.com/uploads/1/3/2/7/132712080/betijogipu_babum_lebiluvaberatoj_dotuduzefazed.pdf
    • http://files.lovegoodboxers.com/uploads/1/3/0/8/130874377/waguvuzakipo.pdf
    • http://vomidiki.centertowndfw.com/uploads/1/3/0/8/130814292/pegorikum_dakamaberazudab_bimusinak.pdf
    • http://minuseru.englishkb.com/uploads/1/3/1/0/131069934/levubudiragosum-guroraku-kasapiva-bibamez.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/xulupig.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/geometric_probability_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0482/6185/7441/files/ww1_propaganda_posters.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0917/files/ejercicios_de_numeros_romanos_para_5_de_primaria.pdf
    • https://cdn.shopify.com/s/files/1/0464/7383/8750/files/luvovakewifolodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/army_trips_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0433/6025/6159/files/intel_chipset_driver_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/correction_livre_physique_terminale_s_hachette.pdf
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/games_n_at_birthday_party.pdf
    • https://cdn.shopify.com/s/files/1/0435/6741/5457/files/28900309193.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1187/files/morphology_and_structure_of_fungi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/30805866492.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd68.bin
1d9f7046d5794e40288afdc53f4136405eb0dcce2db0f5f66a18cdff7f9e558d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD68 5988 bytes
font_01_sfnt_off0000dece.bin
6afe2ee3083c5fd0c7b17b77367944ccf6323d2c531126f2c16578447d9fb4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDECE 23224 bytes

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