Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68a355cb396c1d4…

MALICIOUS

PDF

43.2 KB Created: 2020-09-13 19:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27dea4991bdb4011eabb8b54afc9bd73 SHA-1: de183130e68c28390cec648cdf3d455b67210a13 SHA-256: e68a355cb396c1d481fc8278f268c9f493b34f54a7926cf8387ea678dd4a1256
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic identifying it as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a worksheet, and the primary malicious URL is directly linked to this lure. The ML classifier strongly indicates maliciousness. The PDF structure and embedded links suggest a social engineering attack to redirect users to potentially harmful content.

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.me/wix?keyword=nova+making+stuff+colder+worksheet+answers
    • https://static.usrfiles.com/ugd/3c9ac1_16830d4020ff4e2593550f555e5af64f.pdf
    • https://static.usrfiles.com/ugd/34e21e_a573931821dd4c98a751f77d5967b362.pdf
    • https://static.usrfiles.com/ugd/9904c2_720fdf94faa4433f9b9900bff8fde6a0.pdf
    • https://static.usrfiles.com/ugd/74a852_905e84883cc0484097b25ae5d7ac1517.pdf
    • https://static.usrfiles.com/ugd/3e5db3_4c388738c2954374acec7691bcbc34de.pdf
    • https://cdn.shopify.com/s/files/1/0432/2725/0848/files/cha_cha_charey_video_song_1080p.pdf
    • https://cdn.shopify.com/s/files/1/0440/0375/4142/files/68371412158.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0058/files/movimiento_oscilatorio_y_ondulatorio.pdf
    • https://cdn.shopify.com/s/files/1/0437/0700/7141/files/you_are_a_badass_jen_sincero_fre.pdf
    • https://cdn.shopify.com/s/files/1/0449/4281/9496/files/quant_job_interview_questions_and_answers_second_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0484/1711/2222/files/ps4_remote_play_apk_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0438/4446/8898/files/42327807448.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/69784234882.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ligumugazawebamupewav.pdf
    • https://cdn.shopify.com/s/files/1/0429/1349/7251/files/joled.pdf
    • https://cdn.shopify.com/s/files/1/0433/4184/0552/files/97794281483.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_off00006867.bin
5df8cd68f0d348cdb3db9c0f87045ee0d4e1f30eda56904819cf107b965fc67d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6867 5620 bytes
font_01_sfnt_off00007b7b.bin
b394c3069d857763d2e148d30abf8c98d5c94ba9eb5cce18157ff8c03791405a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7B 10548 bytes

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