Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68eb106329c6ce4…

MALICIOUS

PDF

48.7 KB Created: 2020-08-22 12:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2eff4e96f2f1b08f7d07f6305e3d509 SHA-1: c977f3281e63fd32b41150ca8c661e0a33ee7036 SHA-256: b68eb106329c6ce45aa207e9600cdeb917bd5e039ef72b4c190a0893ca80a6d6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=south+movie++720p'. This URL is embedded within the document body, which also contains text related to movie downloads, suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm designed to distribute malicious content or traffic. The ML classifier also strongly flagged this PDF as malicious.

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=south+movie++720p
    • http://dalosija.drake-oakbrook.com/uploads/1/3/1/0/131070420/4872924.pdf
    • http://files.tooey.com/uploads/1/3/1/3/131380915/kopuxik.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/91264705621.pdf
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/ain_t_no_sunshine_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6207/files/chick_fil_a_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/voxularivuxemakida.pdf
    • https://cdn.shopify.com/s/files/1/0430/4843/5861/files/optimizely_sdk_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/jejako.pdf
    • https://cdn.shopify.com/s/files/1/0455/4902/7493/files/tifekanibeto.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6705/files/fajopubadedefizigi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/enter_the_gungeon_sentient_junk.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/23592353699.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/86059073694.pdf
    • https://cdn.shopify.com/s/files/1/0433/7352/7203/files/malibu_ss_2015.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_off00005edb.bin
1c734afe81a94f0ba079dff8907bbf2f1ccaa5c133e610da10d9d0eb5fae207c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDB 5060 bytes
font_01_sfnt_off00007006.bin
40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7006 3720 bytes
font_02_sfnt_off00007b67.bin
de4b77220f7a7da7dd562bfce7c744e3ae120265ad0a8b7780a84df1dee444c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B67 9888 bytes
font_03_sfnt_off00009d87.bin
ed3c9ec803344a75992fab1f34f43af28de05707070cafe8c0bd22c5578e442c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D87 6876 bytes

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