Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f1291cd1db396a…

MALICIOUS

PDF

43.4 KB Created: 2020-08-22 22:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bb3dcafe8f68278fb27ab49ce49a288 SHA-1: f520c923dbd0c7f1b54d7535d0fb08612ec50ecb SHA-256: 97f1291cd1db396ae336f0f05cc39814581bcbad7435071091d985f534833e0c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure via the URL https://ttraff.com/pify?keyword=avatar+musik+indonesia+apk+obb. Additionally, it features a PDF link farm with 16 external links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=avatar+musik+indonesia+apk+obb
    • http://nopuse.foundationforadrugfreeworldnewyorkchapter.org/uploads/1/3/1/4/131407089/zilebewaxuxutewimiki.pdf
    • http://xalijaz.minimountainstudio.com/uploads/1/3/1/6/131636612/fcc891.pdf
    • http://kunefem.dockconnectionllc.com/uploads/1/3/0/7/130776330/nibemidizig.pdf
    • http://xapudazod.mom-sense.com/uploads/1/3/2/6/132680903/vutoretarumaje-lefozajaga-todovag-pupanid.pdf
    • http://gituzi.susie-carter.com/uploads/1/3/1/4/131409090/9168188.pdf
    • https://cdn.shopify.com/s/files/1/0431/7478/9281/files/70369446471.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7701/files/14912881550.pdf
    • https://cdn.shopify.com/s/files/1/0429/1300/5724/files/cal_state_la_map.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/venn_diagram_problem_solving_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/tasonipuvedulad.pdf
    • https://cdn.shopify.com/s/files/1/0464/6325/4680/files/email_format_sample_for_business.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/radeziwiwilajumigetadad.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6746/files/damabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/42075195499.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2315/files/minecraft_galacticraft_space_station_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/adjectives_synonyms_and_antonyms_exercises.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_off00006515.bin
0a087bc455f7f097ae11a39369535fcb1f6b9514b04c2c86bf990d183130ee5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6515 5324 bytes
font_01_sfnt_off00007715.bin
b271237ffb324f23d61e92ddce7da3df1159146e5e3c45ed909a5c5f604cbf9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7715 12936 bytes

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