Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4db153ac102ff5…

MALICIOUS

PDF

41.9 KB Created: 2020-08-13 23:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0728648793bb81dabdec4097ed6e849 SHA-1: e7620a0fb1ffcaa92da45af837e21549cd7e714a SHA-256: db4db153ac102ff5a285311cc0ab5f8736d771be545ffeb43151d1985458ea1f
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text related to Android development and a URL that is also flagged as a malicious redirector. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=listview+using+baseadapter+in+android
    • http://files.brandonmoorecomposition.com/uploads/1/3/1/4/131438766/muxigem.pdf
    • http://files.thesunflowerkids.org/uploads/1/3/0/8/130813366/gegeboperes_vugon_livaduvewaz.pdf
    • http://difoz.mrsmoothbeatz.com/uploads/1/3/1/6/131637309/7b34fd57c.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3376/files/21494893801.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/sutegitetuvone.pdf
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/21476254312.pdf
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/aikido_the_complete_basic_techniques_gozo_shioda.pdf
    • https://cdn.shopify.com/s/files/1/0434/3349/2641/files/gobor.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4246/files/aide_au_logement_caf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6522/1015/files/23234216499.pdf
    • https://cdn.shopify.com/s/files/1/0428/6735/9900/files/67377236047.pdf
    • https://cdn.shopify.com/s/files/1/0450/6897/6291/files/catecismo_da_igreja_catlica_baixar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6008/files/13006063242.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_off0000571f.bin
3839ec9b69efb1f51d166305148c463af20b1902bc4d297efb6e064e0955bccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x571F 5328 bytes
font_01_sfnt_off00006954.bin
b727eff4223ef6442d4221e90e76e41a69cdc9fee1a4ca3eadddaecd095c4dcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6954 15164 bytes

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