Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd43fac1df0092b2…

MALICIOUS

PDF

36.2 KB Created: 2020-08-24 21:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e35dd146331d39fc04cc0a5e57ddadcb SHA-1: cbfd4c48a90cd397c1477ff74295bdfea65cdde8 SHA-256: dd43fac1df0092b2c8198a31db4c75aefb1fcacf57d56b44fc4eb51cdc104eb2
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary purpose is to redirect users to malicious infrastructure, potentially for further exploitation or phishing.

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=yfn+lucci+been+broke+before
    • http://vupaxefed.legacyministries.info/uploads/1/3/1/4/131483245/7674.pdf
    • http://files.gabiroach.com/uploads/1/3/0/8/130813364/6891265.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/nuroguxukukirawewib.pdf
    • https://cdn.shopify.com/s/files/1/0432/3059/3192/files/rapido_e_devagar.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/7904427783.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/19992837561.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/programming_in_ansi_c_7th_edition_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/72887396362.pdf
    • https://cdn.shopify.com/s/files/1/0437/1290/5384/files/cinebox_apk_android.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/awas_yojana_form_apply_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/3649/2444/files/64059034815.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4902/files/42516037598.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/13258982820.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/american_english_file_3_teacher_s_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.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_off000053ff.bin
ef32d44d12613e51cda7658d40b5387b218dce8744a8a05df6fb0ce530f5e896
pdf-font-stream PDF embedded font (sfnt) at offset 0x53FF 4652 bytes
font_01_sfnt_off000063de.bin
556090b18050d2c13496ef8c606e4369836f510863b43df85751ce3b338db520
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DE 9520 bytes