Malicious PDF — malware analysis report

Static analysis result for SHA-256 80540eace1f756ac…

MALICIOUS

PDF

46.7 KB Created: 2020-08-06 01:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19ae0e7e379ea4e4bd15d4e8ac258ee0 SHA-1: 2a979a724530a59f142c209ce6a766f5b971cb53 SHA-256: 80540eace1f756ac9bd4a02d17bdd42317e4a9a7611a2d960bfbed77f7672f49
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=algorithme+avanc%25C3%25A9+et+complexit%25C3%25A9+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a mass external PDF link farm further indicates a malicious intent to drive traffic to potentially harmful sites.

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=algorithme+avanc%25C3%25A9+et+complexit%25C3%25A9+pdf
    • http://files.freeshoestring.com/uploads/1/3/0/7/130740323/didezazevisax-riwifolavagonif-xokanag-gaxenap.pdf
    • http://files.brianhendersonactor.com/uploads/1/3/0/8/130874329/01212fa13.pdf
    • http://tamud.betterremindersapp.com/uploads/1/3/1/4/131437601/bidetoxezikut.pdf
    • http://files.graniteexpomn.com/uploads/1/3/0/7/130738719/6556225.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/basic_electrical_and_electronics_engineering_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0446/6386/5497/files/advantages_and_disadvantages_of_parliamentary_system.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/20006686844.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/lixomigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/53650185509.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mavadusuwavofemikedoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/38511910091.pdf
    • https://cdn.shopify.com/s/files/1/0431/4945/9605/files/kutukaluminukijobunub.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/attestation_d_hbergement_gouv_fr.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/ielts_general_writing_task_2_samples_band_9.pdf
    • https://cdn.shopify.com/s/files/1/0436/8351/2473/files/ladegijigak.pdf
    • https://cdn.shopify.com/s/files/1/0437/5996/0218/files/91683564128.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/38801882687.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071ea.bin
a1700fca33d6e16974d1aaeb0f94b6041e21f0d8fb3b7214e58a510706d2944a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EA 5648 bytes
font_01_sfnt_off000084be.bin
b810f033a15f81566f64ad0a1db9955c354a5656b70738c0798f4243d77894e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84BE 12472 bytes

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