Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11f7774890e366d…

MALICIOUS

PDF

48.1 KB Created: 2020-08-08 02:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a74abb31ca521d869fcad39fd980b1d SHA-1: 5c00ad24acb605e93ddb3888dd1d140be5e53da6 SHA-256: d11f7774890e366d44d0835ae2cca8cb00be428c2090665b434a0ed18555d7fd
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'list of words with prefixes pdf' and includes the malicious URL. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to a malicious site, likely for phishing or to download further malware.

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=list+of+words+with+prefixes+pdf
    • http://files.bigcountryconcrete.com.au/uploads/1/3/0/7/130739132/xotakekomir.pdf
    • http://files.rusanstowerplace.com/uploads/1/3/0/8/130874567/462c86b7e.pdf
    • http://files.zfamilyenterprises.com/uploads/1/3/0/7/130775045/9211306.pdf
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/fopavavegepovupujikizeme.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/prevention_of_vitamin_a_deficiency.pdf
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/36051483702.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8949/files/leduzejob.pdf
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/sc_caste_list_in_tamilnadu_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0437/7952/2714/files/ratataselugutovew.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/997801564.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/33004906419.pdf
    • https://cdn.shopify.com/s/files/1/0433/8876/4316/files/heat_and_mass_transfer_cengel_5th.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/zejimexarigolemilumagolo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/a_view_from_the_bridge_full.pdf
    • https://cdn.shopify.com/s/files/1/0436/7794/1913/files/weather_api_python.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/54433373487.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068cb.bin
d5db9c77da6b674747b9984370f1468c76c2a05e57f6925aa6888e9f49b4634c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68CB 4668 bytes
font_01_sfnt_off000078d8.bin
d5ada037393d85a46fd01c7640f64ad37a607b0c2ee44f82c861319456eb5079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D8 14108 bytes
font_02_sfnt_off0000a4f7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F7 4324 bytes

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