Malicious PDF — malware analysis report

Static analysis result for SHA-256 36056ab4e2b0e7b9…

MALICIOUS

PDF

49.5 KB Created: 2020-08-15 05:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0785633a52508e4c450d2b50b18b5c44 SHA-1: 031a6dd1a43a1479e1e1a99a1e246679fe155169 SHA-256: 36056ab4e2b0e7b9c15f6dd033a3b223e2841788ba82e4acca5dee852048fca0
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=high+school+gangsters+apk'. This URL is presented within the document body, suggesting a social engineering lure to trick users into downloading potentially malicious content. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy. No scripts were extracted, but the primary attack vector appears to be the malicious redirector.

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.ru/pify?keyword=high+school+gangsters+apk
    • http://lasav.ndesounds.com/uploads/1/3/0/7/130740051/xadejod.pdf
    • http://kisuki.thegoblinball.com/uploads/1/3/1/4/131411896/xakipudexaj.pdf
    • http://roruwina.portwineguesthouse.com/uploads/1/3/0/8/130873715/nokitiparu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/sensory_issues_in_autism.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/difference_between_array_and_arraylist_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/0894/1467/files/res_ieframe_dll_defaultbrowser_htm.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8558/files/10720639257.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/50160646984.pdf
    • https://cdn.shopify.com/s/files/1/0434/7926/9541/files/jeff_nippard_bench_press_specialization_program.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/78335280423.pdf
    • https://cdn.shopify.com/s/files/1/0435/7505/0395/files/84282146937.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/adenovirus_equino.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/nelson_denny_reading_test.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/wevuwonepidonaxoxokipis.pdf
    • https://cdn.shopify.com/s/files/1/0436/0755/6258/files/papoxolejozugoxemigar.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/schneider_opale_switches_catalogue.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_off00005ebf.bin
eb8f35c980898409dfe2af306274449cc8ca75fe1945e63ac17e1235d71fa76b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBF 11088 bytes
font_01_sfnt_off0000831a.bin
01c0cb27f0122ceaf2eef4116871369108dc390e6d33066e9e4f3150a89f6e51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831A 5220 bytes
font_02_sfnt_off000094cf.bin
4d488ef74bccefa3d923a2d387d651a7e2524198b705b722a8c9744dd3c809e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94CF 10808 bytes

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