Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d49ad086f2f994b…

MALICIOUS

PDF

41.7 KB Created: 2020-08-22 03:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 748dfb44cd3e58868d7aabd9669941c5 SHA-1: 0654671535145a3cc0f7fb10b93130b522d3d050 SHA-256: 1d49ad086f2f994bdeae08ee83b69f87e102112bc8ad1215d415492b3866e39f
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its structure, which includes a large number of external links. One of these links points to a known malicious redirector, ttraff.ru, with a keyword suggestive of a lure. The document body contains garbled text but also includes the same malicious URL and several benign-looking Shopify URLs, indicating a link farm strategy. The primary intent appears to be directing users to malicious infrastructure through these embedded links.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=adblock+wifi+ios
    • http://tiwom.stevenconn.net/uploads/1/3/2/7/132710780/buzuviberirokov.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/wozoroligawomopokis.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6183/files/20744722940.pdf
    • https://cdn.shopify.com/s/files/1/0437/9662/7616/files/guided_reading_book_sets_for_first_grade.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2570/files/ssc_chsl_marksheet_2017.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/atlas_de_microbiologia_clnica.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/water_bottle_label_template_free_photoshop.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/viwubawegajigexufigotijud.pdf
    • https://cdn.shopify.com/s/files/1/0433/3305/8715/files/71731257828.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2481/files/riruzafirinaligegetonixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifizazuxapi.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_off0000654b.bin
104eb09dbe820971a9a27e4d56272451dcf4d4654596b79d254ef775e62eacaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654B 4996 bytes
font_01_sfnt_off00007671.bin
47f2b60b69df48c14d14bb32c550b7616218844ae81fecb3698ef939cf809724		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7671 10640 bytes

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