Malicious PDF — malware analysis report

Static analysis result for SHA-256 29738e85dfdc8f17…

MALICIOUS

PDF

60.3 KB Created: 2020-08-06 18:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d45026987a7fe74037960e410576954 SHA-1: 52c44e1f4d27cabd252df3b97acd594bd3218196 SHA-256: 29738e85dfdc8f1716b84cd638c1259aaabe86e97a4ebe9f96dcb97214742245
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, pointing to 'https://ttraff.cc/pify?keyword=jurnal+alkalimetri+adalah+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous external links, many of which are hosted on Shopify domains. The ML classifier strongly supports the malicious verdict.

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=jurnal+alkalimetri+adalah+pdf
    • http://files.7220mercantile.com/uploads/1/3/1/4/131437725/80d25ac7d57e7c0.pdf
    • http://files.teaandmascara.ca/uploads/1/3/1/8/131871994/dd0020ea4.pdf
    • http://files.lighttheearth.com/uploads/1/3/1/8/131857527/pojamimore_kudojezemike_gebisuz_mefazufoxuk.pdf
    • http://files.jacquelynspeare.com/uploads/1/3/1/6/131606231/diwovorub_bigiwovenafefu_bunedub_rapozila.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/46161135776.pdf
    • https://cdn.shopify.com/s/files/1/0437/6707/0877/files/english_to_telugu_dictionary_free_download_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/2191/7598/files/55091418945.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/muwumovem.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0225/files/puxegatudojezuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/saxujivixunamurugir.pdf
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/konexifarapepuxenu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/nisuturamusetezapugosiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/94752662020.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_off00009f52.bin
4d3fb6748bdbfc0676bbc246a341b567ec3707c335db72ae26270b639488ab50
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F52 1684 bytes
font_01_sfnt_off0000a7b6.bin
d0382b3cfc73fb786980bae98297fc02ce4cfdf3c7d83fcbb4feb3cdbf59c625
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B6 5156 bytes
font_02_sfnt_off0000b918.bin
cc5893f358184364fa0801e7901e0b276fa5fe0814824421dfadd315fa1528ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xB918 13848 bytes