Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd53ee744c237c9…

MALICIOUS

PDF

47.1 KB Created: 2020-08-06 13:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d58feafdd912f7b03301bb343607cae9 SHA-1: fa0287d6e38638fee705937064a8fb78b1f4eda6 SHA-256: ecd53ee744c237c9fbe25567037b0be329e9741daaf3536d83ae4121ea5ebc1e
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a significant number of embedded links, many pointing to external PDF files. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.com/pify?keyword=succession+planning+and+management+guide.+pdf. The document body contains garbled text but includes the same redirector URL, suggesting a lure to external content. The primary attack pattern appears to be a link farm or SEO manipulation to distribute malicious 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.com/pify?keyword=succession+planning+and+management+guide.+pdf
    • http://files.agilitydreammaker.com/uploads/1/3/1/8/131857717/fejiliwasipox.pdf
    • http://files.illinoispeoplesaction.org/uploads/1/3/1/3/131380308/votuzi.pdf
    • http://files.2dctravels.com/uploads/1/3/1/3/131383456/7156181.pdf
    • http://files.ruralschoolseducation.org/uploads/1/3/2/3/132302768/5254937.pdf
    • http://files.calacascalifornia.com/uploads/1/3/0/8/130873923/sesabuximon.pdf
    • https://cdn.shopify.com/s/files/1/0434/5869/1232/files/cartooning_philosophy_and_practice.pdf
    • https://cdn.shopify.com/s/files/1/0434/5682/3462/files/fogakaxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0438/5862/4672/files/6435871362.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/99040415317.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7303/files/relic_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/image_align_center_css.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/juwepatajoxitu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6074/6648/files/ctet_answer_key_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/91670160116.pdf
    • https://cdn.shopify.com/s/files/1/0431/9949/6351/files/sizidozufafaxugofos.pdf
    • https://cdn.shopify.com/s/files/1/0427/9150/1990/files/vomomanif.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/rf_to_eu_conversion_rate.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_off0000799c.bin
9aeb7f5de3da2c70115569a15da5155524e4bd3553180d4a08455f5ddcec72ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799C 5516 bytes
font_01_sfnt_off00008c56.bin
daf4382e4433d996d4cf25546ddb3bc8153f07f12de2992ad334d38451e4fee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C56 10160 bytes

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