Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c7ae92676b0603…

MALICIOUS

PDF

46.4 KB Created: 2020-08-29 18:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f8372bb43e0a7b7aaf2dd7a0de5a7a6 SHA-1: 20c7365a5f6642ad15f5f7970d0614469f6ee3c5 SHA-256: 71c7ae92676b0603776fff9c43d19380828b1586eb9d82b21fa3971459b955a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one prominent URL identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain keywords related to product searches, suggesting a lure to a phishing or scam page. The presence of a malicious redirector and a large number of external links points towards an attempt to drive traffic to potentially harmful content.

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.com/wix?keyword=toshiba+satellite+p775-+s7320+price
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/fowoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/anatomy_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/pitirozorenokavodipiwok.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/pfc_boost_converter.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/lilemubo.pdf
    • https://static.usrfiles.com/ugd/b5472a_5320d9e8fcc04ab5865c1eb462657cfa.pdf
    • https://static.usrfiles.com/ugd/b8c837_104ba1b2b00b40cab1152d3abcee4455.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2787976b83f4da9942292be51d2a524.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/black_and_blue_abstract_wallpaper_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6250/files/lsat_trainer_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0436/1977/8720/files/amelie_piano_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/advertising_media_planning_7e.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3342/files/19828284863.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0938/files/for_each_loops_java.pdf
    • https://cdn.shopify.com/s/files/1/0439/6669/3534/files/codice_calixtino_facsimil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006682.bin
592fb314f30ba7bcc65d4b81fc3ce60bcdb6195401451931b4b8065ccd966e1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6682 5464 bytes
font_01_sfnt_off0000792a.bin
b514dc155624653499be56c139a8fb61d221da9b522f1e6c4b40542e0dd54a07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792A 11020 bytes
font_02_sfnt_off00009e65.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E65 4324 bytes

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