Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d367733f7cce3c…

MALICIOUS

PDF

41.0 KB Created: 2020-08-11 06:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa04022151a1c3f4dfe7cd907bb16dbc SHA-1: 27642128216e3b60b03c8cb8cdf3c361ea81d52d SHA-256: b4d367733f7cce3c35c760664e56cee536c4afc23d8c13c2da091d50cbd038e6
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body and embedded links suggest a lure related to 'Ecological disaster pdf', aiming to entice users to click through to potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links further supports a malicious intent, likely for phishing or malware distribution.

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=ecological+disaster+pdf
    • http://files.journeybackancestry.com/uploads/1/3/0/9/130969254/sugomodolewiwobo.pdf
    • http://kamituxol.randallumc.org/uploads/1/3/1/1/131164250/03ec6c6d.pdf
    • http://ruwilife.ecrcme.com/uploads/1/3/2/7/132712615/sojisazosabu.pdf
    • http://files.aurorahealthservices.com/uploads/1/3/1/1/131164157/97b164c3.pdf
    • http://bebunav.wisdomboulevard.com/uploads/1/3/1/4/131409090/7450005.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/93944871852.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/bamarogusoxodatogejok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bixebor.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/jdk_8_new_features.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2184/files/chitiya_kalaiya_song._com.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13164506765.pdf
    • https://cdn.shopify.com/s/files/1/0432/5995/3312/files/arnie_the_doughnut.pdf
    • https://cdn.shopify.com/s/files/1/0436/6296/6937/files/hiv_aids_information_for_project.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0728/files/how_to_terminate_program_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/jevojenipagurogekiluwofi.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_off0000627f.bin
56e927dad9086484a755a30c6bc33a54c48dcd5bc7ab6ba95213a41730efd84c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627F 5280 bytes
font_01_sfnt_off0000747d.bin
dd91bd65e0442bef4901f3d0b3b62bc4bdcbd21191045f41313619ed044e18c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747D 10216 bytes

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