Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c8f521dc54411f…

MALICIOUS

PDF

42.2 KB Created: 2020-09-05 10:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15037df87b21c19a9f4a1ed82de905db SHA-1: 7c99219aef9f1d51217e58cf635b8632df23fa8d SHA-256: d1c8f521dc54411f61d5cd03ead445123943175c9cad7a3465505dca7f310795
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised with a seemingly innocuous keyword. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs hosted on Shopify. This suggests a phishing or redirection attack aiming to lead the user to harmful content.

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=goalkeeper+gloves+size+guide
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/duwile.pdf
    • https://cdn.shopify.com/s/files/1/0436/9989/6475/files/nine_albury_tv_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/wallpaper_shayari_karna_hai.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/sleight_of_hand_crossword_answer.pdf
    • https://cdn.shopify.com/s/files/1/0432/0935/9517/files/dusuwuputajulap.pdf
    • https://cdn.shopify.com/s/files/1/0433/9308/9692/files/pelegolujiwagezebizeril.pdf
    • https://cdn.shopify.com/s/files/1/0438/5931/2800/files/420514779.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/27440438376.pdf
    • https://cdn.shopify.com/s/files/1/0451/5692/5594/files/learn_bass_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/communication_commands_in_linux.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a6b.bin
d07081e8f2ae6ee2afa57332b9e8df504d1b23f62b8c64dcf7c73cd785fbb2aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6B 5028 bytes
font_01_sfnt_off00006ba8.bin
4f3cf4dc57b1d4321d23988b506e89b59e225759fd8506b6e77079c6092cc8c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA8 10152 bytes
font_02_sfnt_off00008e64.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E64 4324 bytes

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