Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46126ed3b14cd5a…

MALICIOUS

PDF

40.2 KB Created: 2020-08-23 05:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddd24234ae556ddd9e319d1f8f7fc87f SHA-1: 6e202cb1585b432f421b30167b8473dccb85d6c5 SHA-256: a46126ed3b14cd5a52a88c433822c5345f5b2f4061ed7228f1148014805f4770
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body and embedded links suggest a tactic to lure users to external content, potentially for SEO manipulation or further malicious redirection. The ML classifier strongly indicated maliciousness.

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=dreams+nepali+movie+free
    • http://nafajera.sunsetairporttransportation.com/uploads/1/3/0/7/130775795/fatugatozapam.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/ancient_rome_city_map.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2808/files/advertising_vocabulary_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1666/6786/files/xaluk.pdf
    • https://cdn.shopify.com/s/files/1/0436/6109/9161/files/lobobofuxudoxeze.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/lokosidixasufabod.pdf
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/klasifikasi_tumor_mediastinum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/22768900664.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/aghora_pashupatha_homam_in_telugu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/pitozanuvulebo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7252/7267/files/lamuli.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004740.bin
c0fcd508c3235eb10b43b0740874b6530c251c8464ba3004f5b41b8b6b6191b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x4740 4812 bytes
font_01_sfnt_off00005775.bin
70e931324462c0b33a04dbf3ce5cbeacdbc6bc4a049284522a1d02cd7e88a163
pdf-font-stream PDF embedded font (sfnt) at offset 0x5775 10280 bytes
font_02_sfnt_off00007a16.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A16 4324 bytes
font_03_sfnt_off00008817.bin
1949fc9c84d8b8682e3340a728eb273853eef46d824795de937a9f2972162965
pdf-font-stream PDF embedded font (sfnt) at offset 0x8817 2748 bytes