Malicious PDF — malware analysis report

Static analysis result for SHA-256 522da1fdd7a95e03…

MALICIOUS

PDF

37.6 KB Created: 2020-08-31 00:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e852403897a33ec29b48994f85191bd8 SHA-1: 3b612c4640ac1c5d2051c19a7b90083bcb0ced90 SHA-256: 522da1fdd7a95e0302240082a577976ed22da7cfd4791edfc571e868cfaf4c06
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a movie title, aiming to trick users into clicking it. The ML classifier strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits. The PDF also contains a large number of benign-looking Shopify links, likely for SEO manipulation or to blend in.

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=aa+te+kevi+duniya+full+movie
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/74953765711.pdf
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/42953063963.pdf
    • https://cdn.shopify.com/s/files/1/0435/3110/8503/files/concepto_de_cambio_climtico.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/compass_learning_odyssey_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/indonesian_language_app.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1703/files/don_t_worry_be_happy_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/2123508494.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5499/files/pimogifiduduxot.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/vezug.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/rawijewiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/19370974183.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0436/8865/7051/files/rafudoselenuvarirekesalet.pdf
    • https://static.usrfiles.com/ugd/74a852_579fa92b99f745c89c092c3889c5fa8c.pdf
    • https://static.usrfiles.com/ugd/52b593_b20fdf9c1a794519be3a957142434ead.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_off000055fa.bin
6df1d309791a415bf6ef801d9543f4b1fbb7014d0b36119188b73f67a205109d
pdf-font-stream PDF embedded font (sfnt) at offset 0x55FA 4996 bytes
font_01_sfnt_off000066f9.bin
f505bb2ef0f473218cc1b0297ff4414267857c58f2ffadd67dcdef8286f46577
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F9 10128 bytes